# Patent

## Title
Gaming system and method for providing a cascading symbol game with shifting symbols in different directions between multiple symbol display position matrices

## Abstract

A gaming system including a cascading symbol game which utilizes a plurality of symbol display position matrices and a plurality of different directions of symbol movement. Each symbol display position matrix includes a plurality of symbol display positions. At least one of the symbol display position matrices includes one or more symbol display positions linked to or otherwise associated with one or more symbol display positions of at least another of the symbol display position matrices. If the gaming system determines that one or more symbols will be repositioned from one or more symbol display positions of one symbol display position matrix to one or more linked symbol display positions of another symbol display position matrix, the gaming system determines a direction of movement of such symbols.

## Background
COPYRIGHT NOTICE
A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to the photocopy reproduction of the patent document or the patent disclosure in exactly the form it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever.
BACKGROUND
Gaming machines which provide players awards in primary or base games are well known. Gaming machines generally require the player to place or make a wager to activate the primary or base game. In many of these gaming machines, the award is based on the player obtaining a winning symbol or symbol combination and on the amount of the wager (e.g., the higher the wager, the higher the award). In such known gaming machines, the amount of the wager made on the base game by the player can vary.
Gaming machines which provide cascading symbol or tumbling reel games are also known. In one such cascading symbol or tumbling reel game, a gaming machine generates and displays a plurality of symbols in a symbol display position matrix or grid. This symbol display position matrix includes a plurality of symbol display positions. Each symbol display position is associated with a specific row and a specific column of the symbol display position matrix. In such a cascading symbol game, the gaming machine evaluates the displayed symbols and provides an award for each winning symbol combination formed. The gaming machine then removes the displayed symbols that form any winning symbol combination to create one or more empty symbol display positions. The gaming machine shifts zero, one, or more of the remaining displayed symbols downward into zero, one, or more of the created empty symbol display positions. If any empty symbol display positions remain, the gaming machine generates and displays a symbol for each remaining empty symbol display position. The gaming machine then evaluates the displayed symbols and provides any award for any winning symbol combinations formed. If winning symbol combinations continue to be formed, the gaming machine repeats the steps of removing generated symbols, shifting generated symbols, generating new symbols, and evaluating generated symbols until no winning symbol combinations remain.
There is a continuing need to increase the level of excitement and entertainment for people playing gaming machines. There is a further need for increasing the number of winning symbol combinations generated and awards provided to a player for a single wager on a play of a game.
SUMMARY
The present disclosure relates generally to gaming systems and methods for providing a cascading symbol game with shifting symbols in different directions between multiple symbol display position matrices.
In various embodiments, the gaming system disclosed herein includes a cascading symbol or tumbling reel game which utilizes a plurality of symbol display position matrices or grids and a plurality of different directions of symbol movement. Each symbol display position matrix includes a plurality of symbol display positions, wherein at least one of the symbol display position matrices includes one or more symbol display positions linked to or otherwise associated with one or more symbol display positions of at least another of the symbol display position matrices. In these embodiments, if the gaming system determines that one or more symbols will be repositioned from one or more symbol display positions of one symbol display position matrix to one or more linked symbol display positions of another symbol display position matrix, the gaming system determines a direction of movement of such symbols. In different embodiments, the direction of movement is based on which linked symbol display positions are empty, which symbols remain displayed at one or more symbol display positions of one or more of the symbol display position matrices and/or which direction of movement is associated with a higher average expected payout. That is, rather than shifting symbols in the same direction for each repositioning of symbols, the gaming system determines a direction of symbol movement from a plurality of directions of symbol movement and shifts one or more symbols (possibly between symbol display position matrices) based on the determined direction of symbol movement. Such a configuration provides an increased level of excitement for certain players by causing one or more symbols to shift in different directions to provide zero, one or more additional awards to the player.
More specifically, in operation of certain embodiments, for a play of a game (or for a plurality of concurrently or overlappingly played games), the gaming system generates and displays a symbol at each symbol display position of each of a plurality of symbol display position matrices or grids. In these embodiments, each symbol display position matrix includes a plurality of symbol display positions, wherein one or more symbol display positions of one symbol display position matrix are linked to or otherwise associated with one or more symbol display positions of at least another symbol display position matrix. For example, at least a first reel, column, row or set of symbol display positions of a first symbol display position matrix is linked to or otherwise associated with at least a first reel, column, row or set of symbol display positions of a second symbol display position matrix.
Following this initial generation of symbols, the gaming system evaluates the generated symbols and provides any awards for any generated winning symbols or generated winning symbol combinations. It should be appreciated that the gaming system independently generates the symbols for each symbol display position grid and further that the gaming system independently evaluates the symbols generated at the symbol display positions of each symbol display position grid.
In addition to providing any awards for any generated winning symbol combinations, the gaming system determines if any of the displayed symbols should be removed. In one embodiment, this determination includes determining, for each of the displayed symbols, whether that symbol is included in one or more winning symbol combinations.
If the gaming system determines that no symbols should be removed, the gaming system concludes the play of the game and awaits another play of another game (or another plurality of concurrently or overlappingly played games). On the other hand, if the gaming system determines that one or more symbols should be removed, the gaming system removes such symbols to create one or more empty symbol display positions.
Following the removal of any generated symbols, the gaming system determines a shifting or reposition direction for zero, one or more of the remaining displayed symbols. In certain embodiments, the gaming system determines a first shifting or repositioning direction for at least one of the remaining displayed symbols and a second, different shifting or repositioning direction for at least another one of the remaining displayed symbols. In certain different embodiments wherein the gaming system determines that one or more empty symbol display positions are created in one or more symbol display positions (of one symbol display position matrix) which are linked to one or more symbol display positions (of another symbol display position matrix), the gaming system determines a shifting direction based on one or more remaining symbols displayed at one or more of the symbol display positions of at least one of the symbol display matrices. For example, if any empty symbol display positions are formed in a first reel, column, row or set of symbol display positions of a first symbol display position matrix, the gaming system determines a shifting direction based on which remaining symbols are displayed at the symbol display positions of at least the first reel, column, row or set of symbol display positions of the first symbol display position matrix versus which remaining symbols are displayed at the symbol display positions of at least the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix. In one such embodiment, the gaming system determines a shifting direction based, at least in part, on which shifting direction provides the player a more lucrative award (or provides the player a greater probability of a more lucrative award).
In another embodiment wherein the gaming system determines that one or more empty symbol display positions are created in one or more symbol display positions (of one symbol display position matrix) which are linked to one or more symbol display positions (of another symbol display position matrix), the gaming system determines a shifting direction based on one or more created empty symbol display positions of at least one of the symbol display matrices. In one such embodiment, the gaming system determines a shifting direction based, at least in part, on the different quantities of created empty symbol display positions in each symbol display position matrix. In one example embodiment, if a first quantity of empty symbol display positions are formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix and a second, different quantity of empty symbol display positions are formed in the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix, the gaming system determines a shifting direction based on such different quantities of empty symbol display positions.
Following the determination of a shifting direction, the gaming system shifts or repositions zero, one or more of the remaining displayed symbols, in the determined shifting direction, into zero, one, or more of the created empty symbol display positions. This shifting creates zero, one or more different empty symbol display positions in one or more of the symbol display position matrices.
In different embodiments, the determined shifting direction, the location of one or more empty symbol display positions and/or whether such empty symbol display positions are in one or more symbol display position matrices determines whether the gaming system will transfer any remaining displayed symbols between symbol display position matrices and/or which symbol display position matrix such remaining displayed symbols are transferred to. That is, if multiple empty linked symbol display positions are created between multiple symbol display position matrices, the determined direction of movement determines which of the multiple symbol display position matrices one or more remaining displayed symbols are transferred to. For example, if: (i) at least one empty symbol display position is formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix, (ii) at least one empty symbol display position is formed in the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix, and (iii) the gaming system determines a first shifting direction, the gaming system shifts or transfers one or more symbols in the first direction from the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix to the first reel, column, row or set of symbol display positions of the first symbol display position matrix to occupy the empty symbol display positions of the first symbol display position matrix. In another example, if: (i) at least one empty symbol display position is formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix, (ii) at least one empty symbol display position is formed in the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix, and (iii) the gaming system determines a second, different shifting direction, the gaming system shifts or transfers one or more symbols in the second direction from the first reel, column, row or set of symbol display positions of the first symbol display position matrix to the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix to occupy the empty symbol display positions of the second symbol display position matrix. It should be appreciated that, as illustrated in this example, if two linked reels, columns, rows or sets of symbol display positions of two symbol display position matrices each include one or more empty symbol display positions, then the different determined shifting directions are associated with which symbol display position matrix one or more remaining displayed symbols are transferred to.
In other embodiments, if multiple empty linked symbol display positions are not created between multiple symbol display position matrices (i.e., one symbol display position matrix includes one or more empty linked symbol display positions and another symbol display position includes no empty linked symbol display positions), the determined direction of movement determines whether or not one or more remaining displayed symbols are transferred between symbol display position matrices. For example, if at least one empty symbol display position is formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix and the gaming system determines a first shifting direction, the gaming system shifts or transfers one or more symbols in the first direction from the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix to the first reel, column, row or set of symbol display positions of the first symbol display position matrix to occupy the empty symbol display positions of the first symbol display position matrix. In another example, if at least one empty symbol display position is formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix and the gaming system determines a second, different shifting direction, the gaming system shifts or transfers one or more symbols in the second direction from one or more symbol display positions in the first reel, column, row or set of symbol display positions of the first symbol display position matrix to one or more different symbol display positions in the first reel, column, row or set of symbol display positions of the first symbol display position matrix. It should be appreciated that, as illustrated in this example, if one linked reel, column, row or set of symbol display positions of one symbol display position matrix includes one or more empty symbol display positions (and the corresponding linked reel, column, row or set of symbol display positions of another symbol display position matrix does not include any empty symbol display positions), then the different determined shifting directions are associated with: (i) transferring one or more remaining displayed symbols from one symbol display position matrix to another symbol display position matrix, and (ii) not transferring one or more remaining displayed symbols from one symbol display position matrix to another symbol display position matrix.
Following this shifting or repositioning of zero, one or more symbols in a determined shifting direction, if any empty symbol display positions remain, the gaming system generates and displays a symbol for each remaining empty symbol display position. The gaming system repeats this process (including removing any symbols, determining a symbol shifting direction and shifting any symbols in the determined symbol shifting direction) until no more symbols are to be removed, such as when no more winning symbol combinations are formed. Such a configuration of removing symbols and generating additional symbols provides the player one or more additional award opportunities in association with one play of a game.
Additional features and advantages are described in, and will be apparent from, the following Detailed Description and the figures.



BRIEF DESCRIPTION OF THE FIGURES
FIG. 1 is a flow chart an example process for operating a gaming system providing one embodiment of a cascading symbol game which employs multiple symbol display position matrices and variable symbol shifting directions as disclosed herein.
FIGS. 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H and 2I are front views of one embodiment of the gaming system disclosed herein illustrating a play of a cascading symbol game which employs multiple symbol display position matrices and multiple symbol shifting directions.
FIG. 3A is a schematic block diagram of one embodiment of a network configuration of the gaming system disclosed herein.
FIG. 3B is a schematic block diagram of one embodiment of an electronic configuration of the gaming system disclosed herein.
FIGS. 4A and 4B are perspective views of example alternative embodiments of the gaming system disclosed herein.



DETAILED DESCRIPTION
Cascading Symbol Game
In various embodiments, the gaming system disclosed herein includes a cascading symbol or tumbling reel game which utilizes a plurality of symbol display position matrices or grids and a plurality of different directions of symbol movement. Each symbol display position matrix includes a plurality of symbol display positions, wherein at least one of the symbol display position matrices includes one or more symbol display positions linked to or otherwise associated with one or more symbol display positions of at least another of the symbol display position matrices. In these embodiments, if the gaming system determines that one or more symbols will be repositioned from one or more symbol display positions of one symbol display position matrix to one or more linked symbol display positions of another symbol display position matrix, the gaming system determines a direction of movement of such symbols. In different embodiments, the direction of movement is based on which linked symbol display positions are empty, which symbols remain displayed at one or more symbol display positions of one or more of the symbol display position matrices and/or which direction of movement is associated with a higher average expected payout. That is, rather than shifting symbols in the same direction for each repositioning of symbols, the gaming system determines a direction of symbol movement from a plurality of directions of symbol movement and shifts one or more symbols (possibly between symbol display position matrices) based on the determined direction of symbol movement. Such a configuration provides an increased level of excitement for certain players by causing one or more symbols to shift in different directions from different symbol display position matrices for different plays of a game to provide zero, one or more additional awards to the player.
While certain of the embodiments described below are directed to playing the cascading symbol game as a primary or base game, it should be appreciated that the present disclosure may additionally or alternatively be employed as a secondary or bonus game. Moreover, while the player's credit balance, the player's wager, and any awards are displayed as an amount of monetary credits or currency in the embodiments described below, one or more of such player's credit balance, such player's wager, and any awards provided to such player may be for non-monetary credits, promotional credits, and/or player tracking points or credits.
Referring now to FIG. 1, a flowchart of an example embodiment of a process for operating a gaming system or a gaming device disclosed herein is illustrated. In one embodiment, this process is embodied in one or more software programs stored in one or more memories and executed by one or more processors or servers. Although this process is described with reference to the flowchart illustrated in FIG. 1, it should be appreciated that many other methods of performing the acts associated with this process may be used. For example, the order of certain steps described may be changed, or certain steps described may be optional.
In one embodiment, as indicated in block 102, the gaming system enables a player to wager on a play of a game having a plurality of symbol display position matrices, wherein each symbol display position matrix includes a plurality of symbol display positions.
For example, as seen in FIG. 2A, the wagered on game is associated with a plurality of symbol display position matrices wherein each symbol display position matrix includes a plurality of symbol display positions 150. Specifically, the wagered on play of the game is associated with: (i) symbol display position matrix 152a which includes symbol display positions 150a, 150b, 150c, 150d, 150e, 150f, 150g, 150h, 150i, 150j, 150k, 1501, 150m, 150n and 150o; and (ii) symbol display position matrix 152b which includes symbol display positions 150aa, 150bb, 150cc, 150dd, 150ee, 150ff, 150gg, 150hh, 150ii, 150jj, 150kk, 150ll, 150mm, 150nn and 150oo. 
In one embodiment, as described above, the gaming system enables a player to wager on a play of a game, wherein the game is associated with a plurality of symbol display position matrices. In another embodiment, the gaming system enables a player to place a plurality of wagers on a plurality of available games wherein each game includes or is otherwise associated with a symbol display position matrix. In this embodiment, each of the plurality of games which the gaming system enables the player to wager on include a plurality or set of symbol display positions, such that the quantity of games the player wagers on corresponds to the quantity of symbol display matrices simultaneously or concurrently employed. In one such embodiment, each available game includes a distinct plurality or set of reels which is associated with or otherwise corresponds to the plurality or set of symbol display positions for that game.
As further seen in block 102 of FIG. 1, at least one of the symbol display position matrices includes one or more symbol display positions associated with one or more different symbol display positions of one or more other symbol display position matrices. That is, at least a first reel, column, row or set of symbol display positions of a first symbol display position matrix is linked to or otherwise associated with at least a first reel, column, row or set of symbol display positions of a second symbol display position matrix.
In the illustrated example of FIG. 2A, symbol display position matrix 152a (and specifically one or more of symbol display positions 150a to 150o) is linked to or otherwise associated with symbol display position matrix 152b (and specifically one or more of symbol display positions 150aa to 150oo). It should be appreciated that the gaming system disclosed herein is configured to link (or otherwise not link) any suitable combination of symbol display position matrices (and specifically one or more reels, columns, rows or sets of symbol display) with each other. In certain embodiments, the gaming system indicates this linking by the alignment of reels, columns, rows or sets of symbol display positions of different symbol display position matrices.
For the wagered on play of the game, at each of the plurality of symbol display positions of each of the symbol display position matrices, the gaming system generates and displays a symbol as indicated in block 104 of FIG. 1.
For example, as seen in FIG. 2A, at a plurality of symbol display positions 150 of a plurality of symbol display position grids 152, the gaming system generates zero, one or more symbols 154. Specifically, as seen in FIG. 2A, the gaming system generated: (i) symbols 154a, 154b, 154c, 154d, 154e, 154f, 154g, 154h, 154i, 154j, 154k, 1541, 154m, 154n and 154o at symbol display positions 150a, 150b, 150c, 150d, 150e, 150f, 150g, 150h, 150i, 150j, 150k, 1501, 150m, 150n and 150o, respectively, of symbol display position grid 152a; and (ii) symbols 154aa, 154bb, 154cc, 154dd, 154ee, 154ff, 154gg, 154hh, 154ii, 154jj, 154kk, 154ll, 154mm, 154nn and 154oo at symbol display positions 150aa, 150bb, 150cc, 150dd, 150ee, 150ff, 150gg, 150hh, 150ii, 150jj, 150kk, 150ll, 150mm, 150nn and 150oo, respectively, of symbol display position grid 152b. 
In one embodiment, the gaming system employs a plurality of symbols to generate and display a symbol at each of the plurality of symbol display positions of each of the symbol display position matrices. In another embodiment, the gaming system employs different pluralities of symbols to generate and display a symbol at each of the plurality of symbol display positions of each of the symbol display position matrices. In this embodiment, the gaming system utilizes a first plurality of symbols to generate and display a symbol at each of the plurality of symbol display positions of at least a first of the symbol display position matrices and utilizes a second, different plurality of symbols to generate and display a symbol at each of the plurality of symbol display positions of at least a second of the symbol display position matrices. That is, in one embodiment, the symbols generated at the symbol display positions of symbol display position grid 152a are generated utilizing a separate set or pool of available symbols than the symbols generated at the symbol display positions of symbol display position grid 152b. 
In one embodiment, the gaming system generates the symbols of each symbol display position matrix independent of each other. That is, for example, the symbols generated at the symbol display positions of symbol display position grid 152a are generated independent from the symbols generated at the symbol display positions of symbol display position grid 152b. In another embodiment, the gaming system generates the symbols of each symbol display position matrix based on or otherwise dependent on each other. That is, for example, the symbols generated at the symbol display positions of symbol display position grid 152a are generated in association with the same reel strip (or generated from the same pool of symbols) as the symbols generated at the symbol display positions of symbol display position grid 152b. 
Following the generation and display of the plurality of symbols at the plurality of symbol display positions of the plurality of symbol display position matrices, the gaming system determines whether the generated symbols form any winning symbol combinations as indicated in diamond 106 of FIG. 1. It should be appreciated that the gaming system independently evaluates the generated symbols of each symbol display position matrix to determine if such generated symbols form any winning symbol combinations.
If the generated symbols did not form any winning symbol combinations, the gaming system terminates the play of the cascading symbols game and returns to block 102 for another placement of another wager on any play of the cascading symbols game.
On the other hand, if the generated symbols form one or more winning symbol combinations as indicated in block 108, the gaming system causes an award to be displayed and provided for each formed winning symbol combination.
As seen in FIG. 2B, upon determining that the symbol combination of cherry symbol 154ff—cherry symbol 154gg and cherry symbol 154hh at symbol display positions 150ff, 150gg and 150hh, respectively, of symbol display position matrix 152b is a winning symbol combination, the gaming system provides the player an award of two-hundred credits associated with this winning symbol combination. In this example, the gaming system provides appropriate messages such as “THE CHERRY-CHERRY-CHERRY COMBINATION IS ASSOCIATED WITH AN AWARD OF 200” to the player visually, or through suitable audio or audiovisual displays.
Following displaying any awards associated with any winning symbol combinations, the gaming system removes zero, one or more of the symbols of one or more of the formed winning symbol combinations to create zero, one or more empty symbol display positions as indicated in block 110 of FIG. 1. Put differently, the gaming system determines, for each generated symbol, if a removal qualification condition is satisfied in association with that symbol.
As seen in FIG. 2C, following the determination that a removal qualification condition is satisfied for each symbol that is part of a winning symbol combination, the gaming system removes cherry symbol 154ff—cherry symbol 154gg and cherry symbol 154hh which form the winning symbol combination. This removal creates empty symbol display positions 150ff, 150gg and 150hh. In this example, the gaming system provides appropriate messages such as “TIME TO REMOVE THE SYMBOLS OF THIS WINNING SYMBOL COMBINATION” to the player visually, or through suitable audio or audiovisual displays.
Following the removal of one or more symbols from one or more symbol display positions, as indicated in block 112 of FIG. 1, the gaming system determines a symbol shifting direction for one or more of any remaining displayed symbols.
In one embodiment, the gaming system determines a symbol shifting direction for each of any remaining displayed symbols. In this embodiment, the gaming system determines one symbol shifting direction wherein each of any of the remaining display symbols will shift, if applicable, in that symbol shifting direction. In another embodiment, the gaming system determines different symbol shifting directions for different remaining displayed symbols. In this embodiment, the gaming system determines a first shifting or repositioning direction for at least one of the remaining displayed symbols and a second, different shifting or repositioning direction for at least another one of the remaining displayed symbols. In one such embodiment, the gaming system determines, for each reel, column, row or set of symbol display positions of each symbol display position matrix, one of a plurality of different shifting directions. In this embodiment, any remaining displayed symbols of different reels, columns, rows or sets of symbol display positions of the same symbol display position matrix (and/or of different symbol display position matrices) will shift in different directions.
In one embodiment, the gaming system determines a symbol shifting direction from a plurality of symbol shifting directions including, but not limited to the directions of downward, upward, sideways to the right, sideways to the left, diagonally upward to the right, diagonally upward to the left, diagonally downward to the right and diagonally downward to the left. In one such embodiment, the gaming system randomly determines the symbol shifting direction. In another embodiment, the gaming system determines the symbol shifting direction based on a predetermined order or listing of symbol shifting directions. In one such embodiment, the direction of shifting of one or more symbols (either to an empty symbol display position within the same symbol display position matrix or to an empty symbol display position of another symbol display position matrix) is based on the quantity of symbol shifts (e.g., a first symbol shift occurs in a first direction and a second symbol shift occurs in a second, different direction).
In one embodiment wherein the gaming system determines that one or more empty symbol display positions are created in one or more symbol display positions (of one symbol display position matrix) which are linked to one or more symbol display positions (of another symbol display position matrix), the gaming system determines a shifting direction based on the location of such empty symbol display positions of at least one of the symbol display matrices. In one such embodiment, the gaming system determines a symbol shifting direction to ensure that any remaining displayed symbols of linked symbol display positions shift or tumble. For example, if: (i) the symbol display positions associated with a first reel of a first symbol display position matrix are linked to the symbol display positions associated with a first reel of a second symbol display position matrix, (ii) the gaming system displays the first symbol display position matrix above the second symbol display position matrix, (iii) the first reel of the first symbol display position matrix includes at least one empty symbol display position, and (iv) the first reel of the second symbol display position matrix includes no empty symbol display positions, then the gaming system determines a symbol shifting direction toward the first reel of the first symbol display position matrix (i.e., an upward symbol shifting direction) to ensure that, as described below, each of the remaining displayed symbols of the first reel of the second symbol display position matrix shift toward the first reel of the first symbol display position matrix. In this example, by determining the symbol shifting direction toward the first reel of the first symbol display position matrix, the gaming system provides that zero, one or more additional winning symbol combinations may be formed in association with both the first symbol display position matrix and the symbols of the second symbol display position matrix. It should be appreciated that in this example, if the gaming system determined a symbol shifting direction away from the first reel of the first symbol display position matrix (i.e., a downward symbol shifting direction), then none of any remaining displayed symbols of the first reel of the second symbol display position matrix would shift to potentially form new and different winning symbol combinations.
In another embodiment, the gaming system determines a shifting direction based on one or more remaining symbols displayed at one or more of the symbol display positions of at least one of the symbol display matrices. That is, the determined direction of shifting of one or more symbols (either to an empty symbol display position within the same symbol display position matrix or to an empty symbol display position of another symbol display position matrix) is based on one or more symbols generated. For example, if any empty symbol display positions are formed in a first reel, column, row or set of symbol display positions of a first symbol display position matrix, the gaming system determines a shifting direction based on which remaining symbols are displayed at the symbol display positions of at least the first reel, column, row or set of symbol display positions of the first symbol display position matrix versus which remaining symbols are displayed at the symbol display positions of at least the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix.
In one such embodiment, the gaming system evaluates the remaining displayed symbols and determines a symbol shifting direction based on maximizing the average expected payout for the player. That is, the gaming system determines a shifting direction based, at least in part, on which shifting direction provides the player a more lucrative award (or provides the player a greater probability of a more lucrative award). Put differently, the gaming system determines, based on one, more or each of the remaining displayed symbols and which symbol combinations may be formed by shifting one or more symbols in different directions, a symbol shifting direction of such remaining displayed symbols. In one such embodiment, if a shifting of symbols in a first direction would create a winning symbol combination and the shifting of symbols in a second, different direction would not create a winning symbol combination, the gaming system determines to shift the symbols in the first direction.
In another embodiment wherein the gaming system determines that one or more empty symbol display positions are created in one or more symbol display positions (of one symbol display position matrix) which are linked to one or more symbol display positions (of another symbol display position matrix), the gaming system determines a shifting direction based on one or more created empty symbol display positions of at least one of the symbol display matrices. In one such embodiment, the gaming system determines a shifting direction based, at least in part, on the different quantities of created empty symbol display positions in each symbol display position matrix. In one example embodiment, if a first quantity of empty symbol display positions are formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix and a second, different quantity of empty symbol display positions are formed in the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix, the gaming system determines a shifting direction based on such different quantities of empty symbol display positions.
In another embodiment, if a quantity of empty symbol display positions are formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix and the same quantity of empty symbol display position are also formed in the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix, the gaming system randomly determines a shifting direction. In another embodiment, if a quantity of empty symbol display positions are formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix and the same quantity of empty symbol display position are also formed in the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix, the gaming system causes zero, one or more symbols from each symbol display position matrix to shift in different directions. For example, the gaming system: (i) shifts one or more symbols from the first symbol display position matrix into the second symbol display position matrix (to fill one or more empty symbol display positions of the second symbol display position matrix) and (ii) shifts one or more symbols from the second symbol display position matrix into the first symbol display position matrix (to fill one or more empty symbol display positions of the first symbol display position matrix). In another embodiment, if a quantity of empty symbol display positions are formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix and the same quantity of empty symbol display position are also formed in the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix, the gaming system causes zero, one or more symbols to shift within such symbol's respective symbol display position matrix (i.e., the gaming system does not cause any symbols to shift from one symbol display position matrix to another symbol display position matrix).
In another embodiment wherein the gaming system determines that one or more empty symbol display positions are created in one or more symbol display positions (of one symbol display position matrix) which are linked to one or more symbol display positions (of another symbol display position matrix), the gaming system determines a shifting direction based on which awards were associated with which winning symbol combinations of the symbol display position matrices. In another embodiment wherein the gaming system determines that one or more empty symbol display positions are created in one or more symbol display positions (of one symbol display position matrix) which are linked to one or more symbol display positions (of another symbol display position matrix), the gaming system determines a shifting direction based on which symbol display position matrices included more (or alternatively less) of one or more designated symbols.
In one embodiment wherein the gaming system determines that one or more empty symbol display positions are created in each of: (i) one or more symbol display positions of one symbol display position matrix, and (ii) one or more linked symbol display positions of another symbol display position matrix, the gaming system determines a shifting direction based on the location of such empty symbol display positions of the symbol display matrices. In another embodiment wherein the gaming system determines that one or more empty symbol display positions are created in each of: (i) one or more symbol display positions of one symbol display position matrix, and (ii) one or more linked symbol display positions of another symbol display position matrix, the gaming system determines a shifting direction based on one or more remaining symbols displayed at one or more of the symbol display positions of at least one of the symbol display matrices. In one such embodiment, the gaming system evaluates the remaining displayed symbols and determines a symbol shifting direction based on maximizing the average expected payout for the player. In another embodiment wherein the gaming system determines that one or more empty symbol display positions are created in each of: (i) one or more symbol display positions of one symbol display position matrix, and (ii) one or more linked symbol display positions of another symbol display position matrix, the gaming system determines a shifting direction based on one or more created empty symbol display positions of the symbol display matrices.
In another embodiment, the gaming system determines a symbol shifting direction based, at least in part, on at least one player selection or player input. Such an embodiment may provide an advantage to the player if one symbol display position matrix had more higher paying symbols than the other symbol display position matrix. For example, if an upper symbol display position matrix contained only major symbols, and the bottom symbol display position matrix contained only minor symbols. In this example, if there were empty positions in the top symbol display position matrix, it would be to the player's advantage to shift symbols downward and add new symbols from the top symbol display position matrix, and potentially get more major symbols (rather than shift the symbols upward).
Returning to FIG. 1, after determining a symbol shifting direction, as indicated in block 114, the gaming system displays another symbol at zero, one or more of the created empty symbol display positions by shifting, in the determined symbol shifting direction, zero, one or more of the remaining symbols into zero, one or more of any empty symbol display positions. As further indicated in block 114, such shifting includes shifting zero, one or more remaining symbols from zero, one or more symbol display positions of one symbol display position matrix to zero, one or more of any linked symbol display positions of another symbol display position matrix.
In one embodiment, for each empty symbol display position of a reel, column, row or set of symbol display positions of a symbol display position matrix that is linked to at least another reel, column, row or set of symbol display positions of another symbol display position matrix, the gaming system shifts or transfers zero, one or more symbols between the linked symbol display position matrices. That is, if two or more reels, columns, rows or sets of symbol display positions of two or more separate symbol display position matrices are linked, the gaming system functions as if the two or more reels, columns, rows or sets of symbol display positions are one reel, column, row or set of symbol display positions of one symbol display position matrix.
In one embodiment, the gaming system shifts zero, one or more symbols into zero, one or more of the created empty symbol display positions according to applicable game rules. For example, under one set of applicable game rules wherein the gaming system determines a symbol shifting direction of shifting symbols downward to fill empty symbol display positions, if a winning symbol combination results in a displayed empty symbol display position along a bottom row of symbol display positions, the gaming system will shift at least one symbol in a symbol display position above the empty symbol display position downward to fill the empty symbol display position. In this example, under these applicable set of game rules, if a winning symbol combination results in a displayed empty symbol display position along a top row of symbol display positions, the gaming system will not shift any symbols to fill the empty symbol display position.
In one such embodiment, the gaming system shifts any remaining symbols as many symbol display positions as possible in the determined symbol shifting direction, while maintaining the position of each shifted symbol relative to one or more other symbols or coordinates. For instance, the gaming system in one embodiment moves, according to a determined symbol shifting direction of downward, each symbol display positioned in a symbol display position adjacently above an empty symbol display position of a column of one or more symbol display position matrices (displayed as one or more reels) downward as far as possible to occupy one or more empty symbol display positions while maintaining the relative order of the symbols of the columns of the symbol display position matrices from top to bottom. In this embodiment, shifting the non-removed symbols does not result in fewer empty symbol display positions. Rather, shifting the non-removed symbols results in a plurality of different empty symbol display positions wherein each empty symbol display position has a designated relationship to any remaining symbols, the relationship based on the direction of shifting. It should be appreciated that in various embodiments, shifting symbols in the determined symbol shifting direction of downward, upward, sideways, diagonally or any suitable shifting direction to fill one or more empty symbol display positions causes a cascading, tumbling, or falling appearance of the symbols in the gaming system, which increases player excitement and enjoyment.
For example, as seen in FIG. 2D, following the creation of empty symbol display positions 150ff, 150gg and 150hh of symbol display position matrix 152b and the determination of a downward symbol shifting direction, the gaming system shifts apple symbol 154aa, seven symbol 154bb and banana symbol 154cc from symbol display positions 150aa, 150bb and 150cc, respectively to symbol display positions 150ff, 150gg and 150hh, respectively. As further seen in this example, since the columns (displayed as dependent reels or a plurality of independent reels) of each of symbol display position matrices 152a and 152b are linked or otherwise associated with each other, the gaming system transferred or repositioned symbols from symbol display position matrix 152a to symbol display position matrix 152b. Specifically, the gaming system shifted double bar symbol 154k, seven symbol 154l and triple bar symbol 154m from symbol display positions 150k, 150l and 150m of symbol display position matrix 152a, respectively to symbol display positions 150aa, 150bb and 150cc, respectively, of symbol display position matrix 152b. As seen in this example, for the linked columns, the gaming system shifted one or more symbols between these two symbol display position matrices as if these two symbol display position matrices were a single symbol display position matrix.
As also seen in FIG. 2D, the shifting of symbols from symbol display position matrix 152a to symbol display position matrix 152b further caused the gaming system to shift banana symbol 154f, apple symbol 154g, money bag symbol 154h, bell symbol 154a, money bag symbol 154b and seven symbol 154c from symbol display positions 150f, 150g, 150h, 150a, 150b and 150c of symbol display position matrix 152a, respectively to symbol display positions 150k, 150l, 150m, 150f, 150g and 150h respectively, of symbol display position matrix 152a. Such shifting creates empty symbol display position 150a, 150b and 150c in symbol display position matrix 152a. In this example, the gaming system provides appropriate messages such as “WATCH THE SYMBOLS SHIFT TO POTENTIALLY FORM EVEN MORE WINNING SYMBOL COMBINATIONS” to the player visually, or through suitable audio or audiovisual displays.
It should be appreciated that in different embodiments, the determined shifting direction, the location of one or more empty symbol display positions and/or whether such empty symbol display positions are in one or more symbol display position matrices determines whether the gaming system will transfer any remaining displayed symbols between symbol display position matrices and/or which symbol display position matrix such remaining displayed symbols are transferred to. That is, if multiple empty linked symbol display positions are created between multiple symbol display position matrices, the determined direction of movement determines which of the multiple symbol display position matrices one or more remaining displayed symbols are transferred to. For example, if: (i) at least one empty symbol display position is formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix, (ii) at least one empty symbol display position is formed in the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix, and (iii) the gaming system determines a first shifting direction, the gaming system shifts or transfers one or more symbols in the first direction from the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix to the first reel, column, row or set of symbol display positions of the first symbol display position matrix to occupy the empty symbol display positions of the first symbol display position matrix. In another example, if: (i) at least one empty symbol display position is formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix, (ii) at least one empty symbol display position is formed in the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix, and (iii) the gaming system determines a second, different shifting direction, the gaming system shifts or transfers one or more symbols in the second direction from the first reel, column, row or set of symbol display positions of the first symbol display position matrix to the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix to occupy the empty symbol display positions of the second symbol display position matrix. Accordingly, as illustrated in this example, if two linked reels, columns, rows or sets of symbol display positions of two symbol display position matrices each include one or more empty symbol display positions, then the different determined shifting directions are associated with which symbol display position matrix one or more remaining displayed symbols are transferred to.
It should be further appreciated that if multiple empty linked symbol display positions are not created between multiple symbol display position matrices (i.e., one symbol display position matrix includes one or more empty linked symbol display positions and another symbol display position includes no empty linked symbol display positions), the determined direction of movement determines whether or not one or more remaining displayed symbols are transferred between symbol display position matrices. For example, if at least one empty symbol display position is formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix and the gaming system determines a first shifting direction, the gaming system shifts or transfers one or more symbols in the first direction from the linked first reel, column, row or set of symbol display positions of the second symbol display position matrix to the first reel, column, row or set of symbol display positions of the first symbol display position matrix to occupy the empty symbol display positions of the first symbol display position matrix. In another example, if at least one empty symbol display position is formed in the first reel, column, row or set of symbol display positions of the first symbol display position matrix and the gaming system determines a second, different shifting direction, the gaming system shifts or transfers one or more symbols in the second direction from one or more symbol display positions in the first reel, column, row or set of symbol display positions of the first symbol display position matrix to one or more different symbol display positions in the first reel, column, row or set of symbol display positions of the first symbol display position matrix. Accordingly, as illustrated in this example, if one linked reel, column, row or set of symbol display positions of one symbol display position matrix includes one or more empty symbol display positions (and the corresponding linked reel, column, row or set of symbol display positions of another symbol display position matrix does not include any empty symbol display positions), then the different determined shifting directions are associated with: (i) transferring one or more remaining displayed symbols from one symbol display position matrix to another symbol display position matrix, and (ii) not transferring one or more remaining displayed symbols from one symbol display position matrix to another symbol display position matrix.
After shifting zero, one or more symbols in the determined symbol shifting direction to create zero, one or more different empty symbol display positions, as indicated in block 116 of FIG. 1, the gaming system generates and displays a symbol at each of any empty symbol display positions. Following the display of a symbol at each of the created empty symbol display positions, the gaming system then returns to diamond 106 and proceeds with determining whether the generated symbols form any winning symbol combinations.
Continuing with the above example, as seen in FIG. 2E, following the shifting of a plurality of the remaining symbols, the gaming system generates: (i) money bag symbol 154p at symbol display position 150a of symbol display position matrix 152a, (ii) triple bar symbol 154q at symbol display position 150b of symbol display position matrix 152a, and (iii) seven symbol 154r at symbol display position 150c of symbol display position matrix 152a. 
As seen in FIG. 2F, upon determining that the symbol combination of money bag symbol 154p—money bag symbol 154b and money bag symbol 154h at symbol display positions 150a, 150g and 150m, respectively, of symbol display position matrix 152a is a winning symbol combination, the gaming system provides the player an award of three-hundred credits associated with this winning symbol combination. In this example, the gaming system provides appropriate messages such as “THE MONEY BAG-MONEY BAG-MONEY BAG COMBINATION IS ASSOCIATED WITH AN AWARD OF 300” to the player visually, or through suitable audio or audiovisual displays.
As seen in FIG. 2G, following the determination that a removal qualification condition is satisfied for each symbol that is part of a winning symbol combination, the gaming system removes money bag symbol 154p—money bag symbol 154b and money bag symbol 154h which form the winning symbol combination. This removal creates empty symbol display positions 150a, 150g and 150m of symbol display position matrix 152a. In this example, the gaming system provides appropriate messages such as “TIME TO REMOVE THE SYMBOLS OF THIS WINNING SYMBOL COMBINATION” to the player visually, or through suitable audio or audiovisual displays.
Following this removal of symbols and the determination of an upward symbol shifting direction, as seen in FIG. 2H, the gaming system shifts bell symbol 154a, banana symbol 154f, and apple symbol 154g from symbol display positions 150f, 150k, and 150l of symbol display position matrix 152a, respectively to symbol display positions 150a, 150f, and 150g respectively, of symbol display position matrix 152a. As further seen in this example, since the columns (displayed as dependent reels or a plurality of independent reels) of each of symbol display position matrices 152a and 152b are linked or otherwise associated with each other, the gaming system transferred or repositioned symbols from symbol display position matrix 152b to symbol display position matrix 152a. Specifically, the gaming system shifted double bar symbol 154k, seven symbol 154l and triple bar symbol 154m from symbol display positions 150aa, 150bb and 150cc, respectively, of symbol display position matrix 152b to symbol display positions 150k, 150l and 150m of symbol display position matrix 152a, respectively. As seen in this example, for the linked columns, the gaming system shifted one or more symbols between these two symbol display position matrices as if these two symbol display position matrices were a single symbol display position matrix.
As also seen in FIG. 2H, the shifting of symbols from symbol display position matrix 152b to symbol display position matrix 152a further caused the gaming system to shift orange symbol 154kk, banana symbol 154ll, double bar symbol 154mm, apple symbol 154aa, seven symbol 154bb and banana symbol 154cc from symbol display positions 150kk, 150ll, 150mm, 150ff, 150gg and 150hh of symbol display position matrix 152b, respectively to symbol display positions 150ff, 150gg, 150hh, 150aa, 150bb and 150cc respectively, of symbol display position matrix 152b. Such shifting creates empty symbol display position 150kk, 150ll and 150mm in symbol display position matrix 152b. In this example, the gaming system provides appropriate messages such as “WATCH THE SYMBOLS SHIFT IN A DIFFERENT DIRECTION TO POTENTIALLY FORM EVEN MORE WINNING SYMBOL COMBINATIONS” to the player visually, or through suitable audio or audiovisual displays.
Continuing with the above example, as seen in FIG. 2I, following the shifting of a plurality of the remaining symbols, the gaming system generates: (i) money bag symbol 154pp at symbol display position 150kk of symbol display position matrix 152b, (ii) banana symbol 154qq at symbol display position 150ll of symbol display position matrix 152b, and (iii) cherry symbol 154rr at symbol display position 150mm of symbol display position matrix 152b. 
After determining that none of the currently generated symbols form any winning symbol combinations associated with any awards, the gaming system terminates the play of the cascading symbols game and awaits another placement of another wager. In this example, the gaming system provides appropriate messages such as “NO MORE WINNING SYMBOL COMBINATIONS” and “GAME OVER” to the player visually, or through suitable audio or audiovisual displays.
In one embodiment, as described above, for each empty symbol display position of a reel, column, row or set of symbol display positions of a symbol display position matrix that is linked to or otherwise associated with at least another reel, column, row or set of symbol display positions of another symbol display position matrix, the gaming system shifts or transfers zero, one or more symbols between the linked symbol display position matrices. In this embodiment, for each empty symbol display position of a reel, column, row or set of symbol display positions of a symbol display position matrix that is not linked to at least another reel, column, row or set of symbol display positions of another symbol display position matrix, the gaming system does not shift or transfer any symbols between the non-linked symbol display position matrices. For example (and not shown), if the middle column of symbol display positions of symbol display position matrix 152a was not linked to any reels, columns, rows or sets of symbol display positions of symbol display position matrix 152b, the gaming system would not shift or transfer any symbols between the middle columns of symbol display positions of symbol display position matrix 152a and symbol display position matrix 152b to fill in the empty symbol display positions of symbol display position matrix 152b. 
In one embodiment, as described above, one or more of the symbol display positions of one or more reels, columns, rows or sets of symbol display positions of one or more symbol display position matrices are linked to at least another reel, column, row or set of symbol display positions of another symbol display position matrix. In another embodiment, each of the symbol display positions of each reel, column, row or set of symbol display positions of each symbol display position matrix is linked to at least another reel, column, row or set of symbol display positions of another symbol display position matrix. In another embodiment, one or more of the symbol display positions of at least one reel, column, row or set of symbol display positions of at least one symbol display position matrix are linked to a plurality of other reels, columns, rows or sets of symbol display positions of a plurality of symbol display position matrices. In another embodiment, each of the symbol display positions of at least one reel, column, row or set of symbol display positions of at least one symbol display position matrix is linked to a plurality of other reels, columns, rows or sets of symbol display positions of a plurality of symbol display position matrices. In another embodiment, at least one of the symbol display positions of one or more reels, columns, rows or sets of symbol display positions of one or more symbol display position matrices are not linked to any reels, columns, rows or sets of symbol display positions of any other symbol display position matrix.
In one such embodiment wherein one or more of the symbol display positions of at least one reel, column, row or set of symbol display positions of at least one symbol display position matrix are linked to a plurality of other reels, columns, rows or sets of symbol display positions of a plurality of symbol display position matrices, the gaming system determines a symbol shifting direction based on the remaining displayed symbols and/or the empty symbol display positions in one or more of the plurality of symbol display position matrices.
In one example, the gaming system includes three symbol display matrices arranged to include a top symbol display position matrix, a middle symbol display position matrix and a bottom symbol display position matrix wherein each of the symbol display positions of at least one reel, column, row or set of symbol display positions of the top symbol display position matrix are linked to at least one reel, column, row or set of symbol display positions of the middle symbol display position matrix which are linked to at least one reel, column, row or set of symbol display positions of the bottom symbol display position matrix. In this example, the symbol shifting direction is based on which symbol display position matrices include empty symbol display positions such that: (i) if the top symbol display position matrix includes no empty symbol display positions and the bottom symbol display position matrix includes at least one empty symbol display position, then regardless of whether or not the middle symbol display position matrix includes any empty symbol display positions, the gaming system determines a symbol shifting direction of downward (i.e., toward the bottom symbol display position matrix), and (ii) if the top symbol display position matrix includes at least one empty symbol display position and the bottom symbol display position matrix includes no empty symbol display positions, then regardless of whether or not the middle symbol display position matrix includes any empty symbol display positions, the gaming system determines a symbol shifting direction of upward (i.e., toward the top symbol display position matrix). In this example, (i) if the top symbol display position matrix includes at least one empty symbol display position and the bottom symbol display position matrix includes at least one empty symbol display position, then regardless of whether or not the middle symbol display position matrix includes any empty symbol display positions, the gaming system determines a symbol shifting direction based on one or more of the different criteria described above (e.g., maximizing the average expected payout for the remainder of the play of the game), and (ii) if the top symbol display position matrix includes no empty symbol display positions, the bottom symbol display position matrix includes no empty symbol display positions and the middle symbol display position matrix includes at least one empty symbol display position, the gaming system determines a symbol shifting direction based on one or more of the different criteria described above (e.g., maximizing the average expected payout for the remainder of the play of the game).
In one embodiment, as described above, the gaming system shifts any remaining symbols as many symbol display positions as possible in the determined symbol shifting direction, while maintaining the position of each shifted symbol relative to one or more other symbols or coordinates. In another embodiment, the gaming system shifts one or more remaining symbols in the determined symbol shifting direction without maintaining the position of each shifted symbol relative to one or more other symbols or coordinates. For example, the gaming system shifts enough symbols from a first symbol display position matrix to fill any empty symbol display positions of a second symbol display position matrix, but does not shift the remaining symbols of the first symbol display position matrix.
In one embodiment, as described above, each symbol display position is part of one symbol display position matrix. In another embodiment, one or more symbol display positions are each part of a plurality of symbol display position matrices. In this embodiment, one or more of the symbol display positions of one or more symbol display position matrices overlap such that at least one symbol display position is part of or otherwise included in a plurality of symbol display position matrices.
In another embodiment, one or more symbols are associated with an indicated quantity, such as a numeral indicated in parentheses next to that symbol. In one embodiment, each time that symbol is shifted, the indicated quantity of that symbol is modified. If the modified quantity of the symbol is less than a predefined quantity and that symbol otherwise qualifies to be removed, then that symbol is not removed from any of the symbol display position matrices. On the other hand, if the modified quantity is greater than the predefined quantity and that symbol otherwise qualifies to be removed, then that symbol is removed from the symbol display position of the symbol display position matrix. In another embodiment, each time a symbol is included in a winning symbol combination (i.e., a removal qualification condition is satisfied for that symbol), the indicated quantity of that symbol is modified. If the modified quantity is greater than a predefined quantity, such as zero, that symbol remains. On the other hand, if the modified quantity of the symbol is equal to or less than the predefined quantity, then that symbol is removed as described above.
In another embodiment, if the modified quantity of the symbol is less than a predefined quantity and that symbol would otherwise shift, in the determined symbol shifting direction, from one symbol display position matrix to another symbol display position matrix, the gaming system enables the symbol to shift from one symbol display position matrix to another symbol display position matrix. On the other hand, if the modified quantity is greater than the predefined quantity and that symbol would otherwise shift from one symbol display position matrix to another symbol display position matrix, the gaming system prevents the symbol from shifting from one symbol display position matrix to another symbol display position matrix.
In another embodiment, each time a symbol is included in a winning symbol combination (i.e., a removal qualification condition is satisfied for that symbol), the indicated quantity of that symbol is modified. If the modified quantity is greater than a predefined quantity, such as zero, and that symbol would otherwise shift, in the determined symbol shifting direction, from one symbol display position matrix to another symbol display position matrix, the gaming system enables the symbol to shift from one symbol display position matrix to another symbol display position matrix. On the other hand, if the modified quantity of the symbol is equal to or less than the predefined quantity and that symbol would otherwise shift from one symbol display position matrix to another symbol display position matrix, the gaming system prevents the symbol from shifting from one symbol display position matrix to another symbol display position matrix. It should be appreciated that the utilization of indicated quantities of such symbol operates similar to the utilization of the wild symbols useable for a designated quantity of symbol generations as described in U.S. Published Patent Application No. 2010/0022297.
In another embodiment, as mentioned above, a plurality of symbols are specific to certain symbol display position grids. In this embodiment, at least one symbol specific to at least one symbol display position grid is configured to be part of at least one winning symbol combination on the symbol display position grid in which it is generated and displayed. In this embodiment, at least one symbol generated in a symbol display position of a first symbol display position grid can also be part of a winning symbol combination when the symbol is shifted or transferred, in the determined symbol shifting direction, to a different symbol display position grid and is combined in a winning symbol combination with a symbol from another symbol display position grid. In this embodiment, the gaming system provides a greater award to the player when the symbol from the first symbol display position grid is transferred to the second symbol display position grid and forms a winning symbol combination with the at least one symbol from the second symbol display position grid. This embodiment also provides increased volatility because by transferring one or more symbols from a symbol display position in one symbol display position grid to one or more symbol display positions in another symbol display position grid, the gaming system is configured to provide awards for symbol combinations that would have been impossible without the transfer.
In one embodiment, the gaming system generates stacked symbols in one or more symbol display position grids. In another embodiment, the gaming system generates wild symbols in one or more symbol display position grids. In another embodiment, the gaming system generates bonus symbols in the first symbol display position grid. In these embodiments, the gaming system does not generate stacked, wild, or bonus symbols in one or more symbol display position grids. In another embodiment, the stacked symbols, wild symbols, or bonus symbols cannot function as stacked symbols, wild symbols, or bonus symbols in a first symbol display position grid, but do function as such if and when they are shifted or transferred, in the determined symbol shifting direction, to a second symbol display position grid.
In another embodiment, the gaming system changes or modifies the functionality of symbols in a first symbol display position grid when the symbol is shifted or transferred, in the determined symbol shifting direction, from the first symbol display position grid to a second symbol display position grid. In another embodiment, the functionality change is represented by a change in appearance of the symbol as it is shifted or transferred from the first symbol display position grid to the second symbol display position grid. This embodiment increases volatility because symbols that were independently generated in the first symbol display position grid have the potential to be shifted or transferred into the second symbol display position grid. Moreover, once the symbols from the first symbol display position grid occupy symbol display positions in the second symbol display position grid, they increase the likelihood that additional winning symbol combinations will result.
In another embodiment, the gaming system enables a player to designate one or more of the symbols to hold wherein the gaming system removes any non-player designated symbols in association with the next shifting of symbols in the determined symbol shifting direction. In this embodiment, the gaming system enables a player to hold one or more symbols wherein one or more non-held symbols are subsequently removed from the symbol display position grid. In one such embodiment, the gaming system implements this feature based on the placement of a wager, such as a side wager or a maximum wager.
In another embodiment which includes one or more player inputs, the gaming system enables a player to designate one or more symbols, wherein the gaming system removes any player designated symbols in association with the next shifting of symbols in the determined symbol shifting direction. In this embodiment, the gaming system enables a player to discard one or more symbols, wherein one or more non-discarded symbols are held at one or more symbol display positions within one or more symbol display position grids. In one such embodiment, the gaming system implements this feature based on the placement of a wager, such as a side wager or a maximum wager.
In another embodiment, the gaming system enables a player to select which reels, columns, rows or sets of symbol display positions of which symbol display position matrices will be linked or otherwise associated with one another. In one such embodiment, the gaming system implements this feature based on the placement of a wager, such as a side wager or a maximum wager.
In another embodiment, the gaming system disclosed herein utilizes the fourth dimension of time to determine any awards to be provided to a player. In different embodiments, the gaming system associates certain symbols with a duration until such symbols shift, in the determined symbol shifting direction, symbol display positions or until such symbols shift, in the determined symbol shifting direction, from one symbol display position matrix to another symbol display position matrix. In another such embodiment, the gaming system associates certain symbols with a duration which those symbols remain in a symbol display position grid. In this embodiment, if a symbol is generated and a removal qualification condition is satisfied in association with that symbol (e.g., the symbol form part of a winning symbol combination), then as long as the associated duration has not expired, the symbol is not removed from the symbol display position of the symbol display position grid. In one such embodiment, if a symbol remain in a symbol display position grid for a designated duration, the gaming system triggers one or more secondary games.
In another embodiment, one or more symbols are associated with an award, such as a value, a modifier (e.g., a multiplier) or a quantity of free spins. In one such embodiment, the gaming system provides an award to a player based on the awards associated with the displayed generated symbols. In another such embodiment, the gaming system provides an award to a player based on the awards associated with the displayed symbols included in a winning symbol combination. In another such embodiment, if a secondary game triggering event occurs, the gaming system triggers a play of a secondary game with one or more features of the secondary game are based on the awards associated with the displayed symbols.
In another embodiment, one or more symbols are associated with a positive outcome and one or more symbols are associated with a negative outcome. In this embodiment, which may be employed in association with a tumbling symbol game (as described above) or in association with a non-tumbling symbol game, the gaming system determines any awards to provide based on the quantity and type of symbols associated with positive outcomes compared to the quantity and type of symbols associated with negative outcomes. In another embodiment, the gaming system determines any awards to provide based on the quantity and type of symbols associated with positive outcomes in one or more symbol display position matrices compared to the quantity and type of symbols associated with negative outcomes in one or more symbol display position matrices. In one such embodiment, one or more outcomes associated with one or more symbols are associated with an attribute, such as a relative weighting of that outcome.
In another embodiment, one or more of the symbol display position grids each have a different depth. Thus, each symbol display position of each symbol display position grid is associated with a specific row, a specific column and a specific depth. Moreover, in each symbol display position grid of this embodiment, one or more symbol display positions are aligned with or otherwise correspond with one or more symbol display positions of one or more symbol display position grids of different depths. That is, one or more symbol display position grids are positioned (relative to the player's line of sight) behind one or more other symbol display position grids and thus one or more symbol display positions of one or more symbol display position grids are positioned (relative to the player's line of sight) behind one or more symbol display positions of one or more other symbol display position grids. It should be appreciated that in one embodiment which utilizes a plurality of symbol display position grids, the creation of one or more empty symbol display positions at one symbol display position grid causes the exposure of symbols generated at symbol display positions of another grid positioned at another depth.
In one embodiment, one or more of the generated symbols include a length component and a width component, such as a two dimensional tile with a symbol displayed on the face of the tile. In one such embodiment which employs a single symbol display position grid, the gaming system generates and displays a symbol in each of the plurality of symbol display positions of the single symbol display position grid. In another such embodiment which employs a plurality of symbol display position grids of different depths, the gaming system generates and displays a symbol in each of the plurality of symbol display positions of each of the plurality of symbol display position grids.
In another embodiment, one or more of the generated symbols are multiple dimension symbols including a length component, a width component and a depth component. In this embodiment, one or more multiple dimension symbols each include any suitable number of sides and any suitable number of individually displayed symbols per side. In an alternative embodiment, one or more faces or sides of one or more multiple dimension symbols and/or symbols do not include an individually displayed symbol.
In one such embodiment which employs a plurality of symbol display position grids of different depths and multiple dimension symbols, the gaming system generates and displays multiple dimension symbols at the plurality of symbol display positions of each of the plurality of symbol display position grids. In certain embodiments, the gaming system generates a symbol at multiple symbol display position matrices having different depths. In these embodiment, the gaming system transfers, based on the determined symbol shifting direction, one or more multiple dimension symbols from one or more symbol display positions of one symbol display position grid to one or more other symbol display positions of one or more other symbol display position grids.
In the embodiments which include a plurality of symbol display position grids, and a plurality of multiple dimension symbols, one or more paylines of any suitable direction extend through a plurality of symbol display positions. In another embodiment, one or more ways to win are associated with a plurality of symbol display positions.
It should be appreciated that in one embodiment which utilizes a plurality of symbol display position grids, when determining if any awards are associated with the currently displayed symbols, the gaming system may evaluate symbols displayed at a plurality of symbol display positions of a plurality of symbol display position grids of a plurality of different depths. That is, since the gaming system of this embodiment evaluates the symbols that are currently displayed to the player and different symbols positioned at different depths may be currently displayed to the player (due to the removal and/or shifting of symbols positioned in front of these symbols), the gaming system is configured to evaluate symbols displayed at different depths to determine any additional awards to provide to the player. Such a configuration provides the player with additional opportunities to win awards in association with a plurality of grids of symbol display positions.
In different embodiments, the awards associated with one or more symbols or winning symbol combinations include one or more of: a quantity of monetary credits, a quantity of non-monetary credits, a quantity of promotional credits, a quantity of player tracking points, a progressive award, a modifier, such as a multiplier, a quantity of free plays of one or more games, a quantity of plays of one or more secondary or bonus games, a multiplier of a quantity of free plays of a game, one or more lottery based awards, such as lottery or drawing tickets, a wager match for one or more plays of one or more games, an increase in the average expected payback percentage for one or more plays of one or more games, one or more comps, such as a free dinner, a free night's stay at a hotel, a high value product such as a free car, or a low value product such as a free teddy bear, one or more bonus credits usable for online play, a lump sum of player tracking points or credits, a multiplier for player tracking points or credits, an increase in a membership or player tracking level, one or more coupons or promotions usable within and/or outside of the gaming establishment (e.g., a 20% off coupon for use at a convenience store), virtual goods associated with the gaming system, virtual goods not associated with the gaming system, an access code usable to unlock content on an internet.
In one embodiment, the gaming system causes at least one display device of at least one electronic gaming machine to display the cascading symbol game. In another embodiment, in addition or in alternative to each electronic gaming machine displaying the cascading symbol game, the gaming system causes one or more community or overhead display devices to display part or all of the cascading symbol game to one or more other players or bystanders either at a gaming establishment or viewing over a network, such as the internet. In another embodiment, in addition or in alternative to each electronic gaming machine displaying the cascading symbol game, the gaming system causes one or more internet sites to each display the cascading symbol game such that a player is enabled to log on from a personal web browser. In another such embodiment, the gaming system enables the player to play one or more games on one device while viewing the cascading symbol game from another device, such as a desktop or laptop computer.
In one embodiment, as described above, a cascading symbol game is a primary or base wagering game. In this embodiment, upon a placement of a wager by a player, the gaming system triggers a play of the cascading symbol game.
In another embodiment, the cascading symbol game is a secondary or bonus game which is triggered in response to an occurrence of a cascading symbol game triggering event. In one such embodiment, a cascading symbol game triggering event occurs, based on an outcome associated with one or more plays of any primary game and/or an outcome associated with one or more plays of any secondary game of the gaming devices in the gaming system. In one embodiment, such determinations are symbol driven based on the generation of one or more designated symbols or symbol combinations. In various embodiments, a generation of a designated symbol (or sub-symbol) or a designated set of symbols (or sub-symbols) over one or more plays of a primary game causes a cascading symbol game triggering event to occur.
In another embodiment, the gaming system does not provide any apparent reasons to the players for a cascading symbol game triggering event to occur. In these embodiments, such determinations are not triggered by an event in a primary game or based specifically on any of the plays of any primary game or on any of the plays of any secondary game of the gaming devices in the system. That is, these events occur without any explanation or alternatively with simple explanations.
In one such embodiment, a cascading symbol game triggering event occurs based on an amount of coin-in. In this embodiment, the gaming system determines if an amount of coin-in wagered reaches or exceeds a designated amount of coin-in (i.e., a threshold coin-in amount). Upon the amount of coin-in wagered reaching or exceeding the threshold coin-in amount, the gaming system causes one or more of such events or conditions to occur. In another such embodiment, a cascading symbol game triggering event occurs based on an amount of virtual currency-in. In this embodiment, the gaming system determines if an amount of virtual currency-in wagered reaches or exceeds a designated amount of virtual currency-in (i.e., a threshold virtual currency-in amount). Upon the amount of virtual currency-in wagered reaching or exceeding the threshold virtual currency-in amount, the gaming system causes one or more of such events or conditions to occur. In different embodiments, the threshold coin-in amount and/or the threshold virtual currency-in amount is predetermined, randomly determined, determined based on a player's status (such as determined through a player tracking system), determined based on a generated symbol or symbol combination, determined based on a random determination by the central controller, determined based on a random determination at the gaming device, determined based on one or more side wagers placed, determined based on the player's primary game wager, determined based on time (such as the time of day) or determined based on any other suitable method or criteria.
In one such embodiment, a cascading symbol game triggering event occurs based on an amount of coin-out. In this embodiment, the gaming system determines if an amount of coin-out reaches or exceeds a designated amount of coin-out (i.e., a threshold coin-out amount). Upon the amount of coin-out reaching or exceeding the threshold coin-out amount, the gaming system causes one or more of such events or conditions to occur. In another such embodiment, a cascading symbol game triggering event occurs based on an amount of virtual currency-out. In this embodiment, the gaming system determines if an amount of virtual currency-out reaches or exceeds a designated amount of virtual currency-out (i.e., a threshold virtual currency-out amount). Upon the amount of virtual currency-out reaching or exceeding the threshold virtual currency-out amount, the gaming system causes one or more of such events or conditions to occur. In different embodiments, the threshold coin-out amount and/or the threshold virtual currency-out amount is predetermined, randomly determined, determined based on a player's status (such as determined through a player tracking system), determined based on a generated symbol or symbol combination, determined based on a random determination by the central controller, determined based on a random determination at the gaming device, determined based on one or more side wagers placed, determined based on the player's primary game wager, determined based on time (such as the time of day) or determined based on any other suitable method or criteria.
In another alternative embodiment, a cascading symbol game triggering event occurs based on a predefined variable reaching a defined parameter threshold. For example, when the 500,000th player has played a gaming device of the gaming system (ascertained from a player tracking system), one or more of such events or conditions occur. In different embodiments, the predefined parameter thresholds include a length of time, a length of time after a certain dollar amount is hit, a wager level threshold for a specific device (which gaming device is the first to contribute $250,000), a number of gaming devices active, or any other parameter that defines a suitable threshold.
In another alternative embodiment, a cascading symbol game triggering event occurs based on a quantity of games played. In this embodiment, a quantity of games played is set for when one or more of such events or conditions will occur. In one embodiment, such a set quantity of games played is based on historic data.
In another alternative embodiment, a cascading symbol game triggering event occurs based on time. In this embodiment, a time is set for when one or more of such events or conditions will occur. In one embodiment, such a set time is based on historic data.
In another alternative embodiment, a cascading symbol game triggering event occurs based upon gaming system operator defined player eligibility parameters stored on a player tracking system (such as via a player tracking card or other suitable manner). In this embodiment, the parameters for eligibility are defined by the gaming system operator based on any suitable criterion. In one embodiment, the gaming system recognizes the player's identification (via the player tracking system) when the player inserts or otherwise associates their player tracking card in the gaming device. The gaming system determines the player tracking level of the player and if the current player tracking level defined by the gaming system operator is eligible for one or more of such events or conditions. In one embodiment, the gaming system operator defines minimum bet levels required for such events or conditions to occur based on the player's card level.
In another alternative embodiment, a cascading symbol game triggering event occurs based on a system determination, including one or more random selections by the central controller. In one embodiment, as described above, the central controller tracks all active gaming devices and the wagers they placed. In one such embodiment, based on the gaming device's state as well as one or more wager pools associated with the gaming device, the central controller determines whether to one or more of such events or conditions will occur. In one such embodiment, the player who consistently places a higher wager is more likely to be associated with an occurrence of one or more of such events or conditions than a player who consistently places a minimum wager. It should be appreciated that the criteria for determining whether a player is in active status or inactive status for determining if one or more of such events occur may the same as, substantially the same as, or different than the criteria for determining whether a player is in active status or inactive status for another one of such events to occur.
In another alternative embodiment, a cascading symbol game triggering event occurs based on a determination of if any numbers allotted to a gaming device match a randomly selected number. In this embodiment, upon or prior to each play of each gaming device, a gaming device selects a random number from a range of numbers and during each primary game, the gaming device allocates the first N numbers in the range, where N is the number of credits bet by the player in that primary game. At the end of the primary game, the randomly selected number is compared with the numbers allocated to the player and if a match occurs, one or more of such events or conditions occur. It should be appreciated that any suitable manner of causing a cascading symbol game triggering event to occur may be implemented in accordance with the gaming system and method disclosed herein.
It should be appreciated that any of the above-described cascading symbol game triggering events may be combined in one or more different embodiments.
Alternative Embodiments
It should be appreciated that in different embodiments, one or more of:

    
    
        i. a shape or configuration of each symbol display position grid;
        ii. a quantity of rows in each symbol display position grid;
        iii. a quantity of columns in each symbol display position grid;
        iv. a quantity of symbol display position matrices;
        v. a configuration of a plurality of symbol display position matrices;
        vi. a quantity of symbol display positions in each symbol display position grid;
        vii. a quantity of linked reels, columns, rows or sets of symbol display positions between symbol display position matrices;
        viii. a quantity of symbols generated;
        ix. a direction of any shifting of any symbols;
        x. which symbols are shifted;
        xi. which symbols are shifted which directions;
        xii. which symbols retain their original positioning;
        xiii. a determination of if one or more symbols will be removed;
        xiv. which symbol combinations are winning symbol combinations;
        xv. which awards are associated with which winning symbol combinations;
        xvi. which symbols, if any, are removed from which symbol display position grids;
        xvii. which symbols are available to be generated in each symbol display position grid;
        xviii. a duration of time a symbol will remain at one of the symbol display positions;
        xix. a quantity of winning symbols combinations which a symbol will remain at one of the symbol display positions;
        xx. a quantity of satisfactions of a removal qualification condition which a symbol will remain at one of the symbol display positions;
        xxi. a quantity of symbol shifts a symbol will remain at one of the symbol display positions;
        xxii. a quantity of games played in which a symbol will remain at one of the symbol display positions;
        xxiii. a determination of whether to enable a player to make any inputs to hold any symbols;
        xxiv. a determination of whether to enable a player to make any inputs to discard any symbols; and/or
        xxv. any determination disclosed herein;

is/are predetermined, randomly determined, randomly determined based on one or more weighted percentages, determined based on a generated symbol or symbol combination, determined independent of a generated symbol or symbol combination, determined based on a random determination by the central controller, determined independent of a random determination by the central controller, determined based on a random determination at the gaming system, determined independent of a random determination at the gaming system, determined based on at least one play of at least one game, determined independent of at least one play of at least one game, determined based on a player's selection, determined independent of a player's selection, determined based on one or more side wagers placed, determined independent of one or more side wagers placed, determined based on the player's primary game wager, determined independent of the player's primary game wager, determined based on time (such as the time of day), determined independent of time (such as the time of day), determined based on an amount of coin-in accumulated in one or more pools, determined independent of an amount of coin-in accumulated in one or more pools, determined based on a status of the player (i.e., a player tracking status), determined independent of a status of the player (i.e., a player tracking status), determined based on one or more other determinations disclosed herein, determined independent of any other determination disclosed herein or determined based on any other suitable method or criteria.

    
    


Gaming Systems
It should be appreciated that the above-described embodiments of the present disclosure may be implemented in accordance with or in conjunction with one or more of a variety of different types of gaming systems, such as, but not limited to, those described below.
The present disclosure contemplates a variety of different gaming systems each having one or more of a plurality of different features, attributes, or characteristics. It should be appreciated that a “gaming system” as used herein refers to various configurations of: (a) one or more central servers, central controllers, or remote hosts; (b) one or more electronic gaming machines (“EGMs”); and/or (c) one or more personal gaming devices, such as desktop computers, laptop computers, tablet computers or computing devices, personal digital assistants (PDAs), mobile telephones such as smart phones, and other mobile computing devices.
Thus, in various embodiments, the gaming system of the present disclosure includes: (a) one or more EGMs in combination with one or more central servers, central controllers, or remote hosts; (b) one or more personal gaming devices in combination with one or more central servers, central controllers, or remote hosts; (c) one or more personal gaming devices in combination with one or more EGMs; (d) one or more personal gaming devices, one or more EGMs, and one or more central servers, central controllers, or remote hosts in combination with one another; (e) a single EGM; (f) a plurality of EGMs in combination with one another; (g) a single personal gaming device; (h) a plurality of personal gaming devices in combination with one another; (i) a single central server, central controller, or remote host; and/or (j) a plurality of central servers, central controllers, or remote hosts in combination with one another.
For brevity and clarity, each EGM and each personal gaming device of the present disclosure is collectively referred herein as an “EGM.” Additionally, for brevity and clarity, unless specifically stated otherwise, “EGM” as used herein represents one EGM or a plurality of EGMs, and “central server, central controller, or remote host” as used herein represents one central server, central controller, or remote host or a plurality of central servers, central controllers, or remote hosts.
As noted above, in various embodiments, the gaming system includes an EGM in combination with a central server, central controller, or remote host. In such embodiments, the EGM is configured to communicate with the central server, central controller, or remote host through a data network or remote communication link. In certain such embodiments, the EGM is configured to communicate with another EGM through the same data network or remote communication link or through a different data network or remote communication link. For example, the gaming system illustrated in FIG. 3A includes a plurality of EGMs 1010 that are each configured to communicate with a central server, central controller, or remote host 1056 through a data network 1058.
In certain embodiments in which the gaming system includes an EGM in combination with a central server, central controller, or remote host, the central server, central controller, or remote host is any suitable computing device (such as a server) that includes at least one processor and at least one memory device or storage device. As further described herein, the EGM includes at least one EGM processor configured to transmit and receive data or signals representing events, messages, commands, or any other suitable information between the EGM and the central server, central controller, or remote host. The at least one processor of that EGM is configured to execute the events, messages, or commands represented by such data or signals in conjunction with the operation of the EGM. Moreover, the at least one processor of the central server, central controller, or remote host is configured to transmit and receive data or signals representing events, messages, commands, or any other suitable information between the central server, central controller, or remote host and the EGM. The at least one processor of the central server, central controller, or remote host is configured to execute the events, messages, or commands represented by such data or signals in conjunction with the operation of the central server, central controller, or remote host. It should be appreciated that one, more, or each of the functions of the central server, central controller, or remote host may be performed by the at least one processor of the EGM. It should be further appreciated that one, more, or each of the functions of the at least one processor of the EGM may be performed by the at least one processor of the central server, central controller, or remote host.
In certain such embodiments, computerized instructions for controlling any games (such as any primary or base games and/or any secondary or bonus games) displayed by the EGM are executed by the central server, central controller, or remote host. In such “thin client” embodiments, the central server, central controller, or remote host remotely controls any games (or other suitable interfaces) displayed by the EGM, and the EGM is utilized to display such games (or suitable interfaces) and to receive one or more inputs or commands. In other such embodiments, computerized instructions for controlling any games displayed by the EGM are communicated from the central server, central controller, or remote host to the EGM and are stored in at least one memory device of the EGM. In such “thick client” embodiments, the at least one processor of the EGM executes the computerized instructions to control any games (or other suitable interfaces) displayed by the EGM.
In various embodiments in which the gaming system includes a plurality of EGMs, one or more of the EGMs are thin client EGMs and one or more of the EGMs are thick client EGMs. In other embodiments in which the gaming system includes one or more EGMs, certain functions of one or more of the EGMs are implemented in a thin client environment, and certain other functions of one or more of the EGMs are implemented in a thick client environment. In one such embodiment in which the gaming system includes an EGM and a central server, central controller, or remote host, computerized instructions for controlling any primary or base games displayed by the EGM are communicated from the central server, central controller, or remote host to the EGM in a thick client configuration, and computerized instructions for controlling any secondary or bonus games or other functions displayed by the EGM are executed by the central server, central controller, or remote host in a thin client configuration.
In certain embodiments in which the gaming system includes: (a) an EGM configured to communicate with a central server, central controller, or remote host through a data network; and/or (b) a plurality of EGMs configured to communicate with one another through a data network, the data network is a local area network (LAN) in which the EGMs are located substantially proximate to one another and/or the central server, central controller, or remote host. In one example, the EGMs and the central server, central controller, or remote host are located in a gaming establishment or a portion of a gaming establishment.
In other embodiments in which the gaming system includes: (a) an EGM configured to communicate with a central server, central controller, or remote host through a data network; and/or (b) a plurality of EGMs configured to communicate with one another through a data network, the data network is a wide area network (WAN) in which one or more of the EGMs are not necessarily located substantially proximate to another one of the EGMs and/or the central server, central controller, or remote host. For example, one or more of the EGMs are located: (a) in an area of a gaming establishment different from an area of the gaming establishment in which the central server, central controller, or remote host is located; or (b) in a gaming establishment different from the gaming establishment in which the central server, central controller, or remote host is located. In another example, the central server, central controller, or remote host is not located within a gaming establishment in which the EGMs are located. It should be appreciated that in certain embodiments in which the data network is a WAN, the gaming system includes a central server, central controller, or remote host and an EGM each located in a different gaming establishment in a same geographic area, such as a same city or a same state. It should be appreciated that gaming systems in which the data network is a WAN are substantially identical to gaming systems in which the data network is a LAN, though the quantity of EGMs in such gaming systems may vary relative to one another.
In further embodiments in which the gaming system includes: (a) an EGM configured to communicate with a central server, central controller, or remote host through a data network; and/or (b) a plurality of EGMs configured to communicate with one another through a data network, the data network is an internet or an intranet. In certain such embodiments, an internet browser of the EGM is usable to access an internet game page from any location where an internet connection is available. In one such embodiment, after the internet game page is accessed, the central server, central controller, or remote host identifies a player prior to enabling that player to place any wagers on any plays of any wagering games. In one example, the central server, central controller, or remote host identifies the player by requiring a player account of the player to be logged into via an input of a unique username and password combination assigned to the player. It should be appreciated, however, that the central server, central controller, or remote host may identify the player in any other suitable manner, such as by validating a player tracking identification number associated with the player; by reading a player tracking card or other smart card inserted into a card reader (as described below); by validating a unique player identification number associated with the player by the central server, central controller, or remote host; or by identifying the EGM, such as by identifying the MAC address or the IP address of the internet facilitator. In various embodiments, once the central server, central controller, or remote host identifies the player, the central server, central controller, or remote host enables placement of one or more wagers on one or more plays of one or more primary or base games and/or one or more secondary or bonus games, and displays those plays via the internet browser of the EGM.
It should be appreciated that the central server, central server, or remote host and the EGM are configured to connect to the data network or remote communications link in any suitable manner. In various embodiments, such a connection is accomplished via: a conventional phone line or other data transmission line, a digital subscriber line (DSL), a T-1 line, a coaxial cable, a fiber optic cable, a wireless or wired routing device, a mobile communications network connection (such as a cellular network or mobile internet network), or any other suitable medium. It should be appreciated that the expansion in the quantity of computing devices and the quantity and speed of internet connections in recent years increases opportunities for players to use a variety of EGMs to play games from an ever-increasing quantity of remote sites. It should also be appreciated that the enhanced bandwidth of digital wireless communications may render such technology suitable for some or all communications, particularly if such communications are encrypted. Higher data transmission speeds may be useful for enhancing the sophistication and response of the display and interaction with players.
EGM Components
In various embodiments, an EGM includes at least one processor configured to operate with at least one memory device, at least one input device, and at least one output device. The at least one processor may be any suitable processing device or set of processing devices, such as a microprocessor, a microcontroller-based platform, a suitable integrated circuit, or one or more application-specific integrated circuits (ASICs). FIG. 3B illustrates an example EGM including a processor 1012.
As generally noted above, the at least one processor of the EGM is configured to communicate with, configured to access, and configured to exchange signals with at least one memory device or data storage device. In various embodiments, the at least one memory device of the EGM includes random access memory (RAM), which can include non-volatile RAM (NVRAM), magnetic RAM (MRAM), ferroelectric RAM (FeRAM), and other forms as commonly understood in the gaming industry. In other embodiments, the at least one memory device includes read only memory (ROM). In certain embodiments, the at least one memory device of the EGM includes flash memory and/or EEPROM (electrically erasable programmable read only memory). The example EGM illustrated in FIG. 3B includes a memory device 1014. It should be appreciated that any other suitable magnetic, optical, and/or semiconductor memory may operate in conjunction with the EGM disclosed herein. In certain embodiments, the at least one processor of the EGM and the at least one memory device of the EGM both reside within a cabinet of the EGM (as described below). In other embodiments, at least one of the at least one processor of the EGM and the at least one memory device of the EGM reside outside the cabinet of the EGM (as described below).
In certain embodiments, as generally described above, the at least one memory device of the EGM stores program code and instructions executable by the at least one processor of the EGM to control the EGM. The at least one memory device of the EGM also stores other operating data, such as image data, event data, input data, random number generators (RNGs) or pseudo-RNGs, paytable data or information, and/or applicable game rules that relate to the play of one or more games on the EGM (such as primary or base games and/or secondary or bonus games as described below). In various embodiments, part or all of the program code and/or the operating data described above is stored in at least one detachable or removable memory device including, but not limited to, a cartridge, a disk, a CD ROM, a DVD, a USB memory device, or any other suitable non-transitory computer readable medium. In certain such embodiments, an operator (such as a gaming establishment operator) and/or a player uses such a removable memory device in an EGM to implement at least part of the present disclosure. In other embodiments, part or all of the program code and/or the operating data is downloaded to the at least one memory device of the EGM through any suitable data network described above (such as an internet or intranet).
In various embodiments, the EGM includes one or more input devices. The input devices may include any suitable device that enables an input signal to be produced and received by the at least one processor of the EGM. The example EGM illustrated in FIG. 3B includes at least one input device 1030. One input device of the EGM is a payment device configured to communicate with the at least one processor of the EGM to fund the EGM. In certain embodiments, the payment device includes one or more of: (a) a bill acceptor into which paper money is inserted to fund the EGM; (b) a ticket acceptor into which a ticket or a voucher is inserted to fund the EGM; (c) a coin slot into which coins or tokens are inserted to fund the EGM; (d) a reader or a validator for credit cards, debit cards, or credit slips into which a credit card, debit card, or credit slip is inserted to fund the EGM; (e) a player identification card reader into which a player identification card is inserted to fund the EGM; or (f) any suitable combination thereof. FIGS. 4A and 4B illustrate example EGMs that each include the following payment devices: (a) a combined bill and ticket acceptor 1128, and (b) a coin slot 1126.
In one embodiment, the EGM includes a payment device configured to enable the EGM to be funded via an electronic funds transfer, such as a transfer of funds from a bank account. In another embodiment, the EGM includes a payment device configured to communicate with a mobile device of a player, such as a cell phone, a radio frequency identification tag, or any other suitable wired or wireless device, to retrieve relevant information associated with that player to fund the EGM. It should be appreciated that when the EGM is funded, the at least one processor determines the amount of funds entered and displays the corresponding amount on a credit display or any other suitable display as described below.
In various embodiments, one or more input devices of the EGM are one or more game play activation devices that are each used to initiate a play of a game on the EGM or a sequence of events associated with the EGM following appropriate funding of the EGM. The example EGMs illustrated in FIGS. 4A and 4B each include a game play activation device in the form of a game play initiation button 32. It should be appreciated that, in other embodiments, the EGM begins game play automatically upon appropriate funding rather than upon utilization of the game play activation device.
In certain embodiments, one or more input devices of the EGM are one or more wagering or betting devices. One such wagering or betting device is as a maximum wagering or betting device that, when utilized, causes a maximum wager to be placed. Another such wagering or betting device is a repeat the bet device that, when utilized, causes the previously-placed wager to be placed. A further such wagering or betting device is a bet one device. A bet is placed upon utilization of the bet one device. The bet is increased by one credit each time the bet one device is utilized. Upon the utilization of the bet one device, a quantity of credits shown in a credit display (as described below) decreases by one, and a number of credits shown in a bet display (as described below) increases by one. It should be appreciated that while the player's credit balance, the player's wager, and any awards are displayed as an amount of monetary credits or currency in the embodiments described herein, one or more of such player's credit balance, such player's wager, and any awards provided to such player may be for non-monetary credits, promotional credits, and/or player tracking points or credits.
In other embodiments, one input device of the EGM is a cash out device. The cash out device is utilized to receive a cash payment or any other suitable form of payment corresponding to a quantity of remaining credits of a credit display (as described below). The example EGMs illustrated in FIGS. 4A and 4B each include a cash out device in the form of a cash out button 1134.
In certain embodiments, one input device of the EGM is a touch-screen coupled to a touch-screen controller or other touch-sensitive display overlay to enable interaction with any images displayed on a display device (as described below). One such input device is a conventional touch-screen button panel. The touch-screen and the touch-screen controller are connected to a video controller. In these embodiments, signals are input to the EGM by touching the touch screen at the appropriate locations.
In various embodiments, one input device of the EGM is a sensor, such as a camera, in communication with the at least one processor of the EGM (and controlled by the at least one processor of the EGM in some embodiments) and configured to acquire an image or a video of a player using the EGM and/or an image or a video of an area surrounding the EGM.
In embodiments including a player tracking system, as further described below, one input device of the EGM is a card reader in communication with the at least one processor of the EGM. The example EGMs illustrated in FIGS. 4A and 4B each include a card reader 1138. The card reader is configured to read a player identification card inserted into the card reader.
In various embodiments, the EGM includes one or more output devices. The example EGM illustrated in FIG. 3B includes at least one output device 1060. One or more output devices of the EGM are one or more display devices configured to display any game(s) displayed by the EGM and any suitable information associated with such game(s). In certain embodiments, the display devices are connected to or mounted on a cabinet of the EGM (as described below). In various embodiments, the display devices serves as digital glass configured to advertise certain games or other aspects of the gaming establishment in which the EGM is located. In various embodiments, the EGM includes one or more of the following display devices: (a) a central display device; (b) a player tracking display configured to display various information regarding a player's player tracking status (as described below); (c) a secondary or upper display device in addition to the central display device and the player tracking display; (d) a credit display configured to display a current quantity of credits, amount of cash, account balance, or the equivalent; and (e) a bet display configured to display an amount wagered for one or more plays of one or more games. The example EGM illustrated in FIG. 4A includes a central display device 1116, a player tracking display 1140, a credit display 1120, and a bet display 1122. The example EGM illustrated in FIG. 4B includes a central display device 1116, an upper display device 1118, a player tracking display 1140, a player tracking display 1140, a credit display 1120, and a bet display 1122.
In various embodiments, the display devices include, without limitation: a monitor, a television display, a plasma display, a liquid crystal display (LCD), a display based on light emitting diodes (LEDs), a display based on a plurality of organic light-emitting diodes (OLEDs), a display based on polymer light-emitting diodes (PLEDs), a display based on a plurality of surface-conduction electron-emitters (SEDs), a display including a projected and/or reflected image, or any other suitable electronic device or display mechanism. In certain embodiments, as described above, the display device includes a touch-screen with an associated touch-screen controller. It should be appreciated that the display devices may be of any suitable sizes, shapes, and configurations.
The display devices of the EGM are configured to display one or more game and/or non-game images, symbols, and indicia. In certain embodiments, the display devices of the EGM are configured to display any suitable visual representation or exhibition of the movement of objects; dynamic lighting; video images; images of people, characters, places, things, and faces of cards; and the like. In certain embodiments, the display devices of the EGM are configured to display one or more video reels, one or more video wheels, and/or one or more video dice. In other embodiments, certain of the displayed images, symbols, and indicia are in mechanical form. That is, in these embodiments, the display device includes any electromechanical device, such as one or more rotatable wheels, one or more reels, and/or one or more dice, configured to display at least one or a plurality of game or other suitable images, symbols, or indicia.
In various embodiments, one output device of the EGM is a payout device. In these embodiments, when the cash out device is utilized as described above, the payout device causes a payout to be provided to the player. In one embodiment, the payout device is one or more of: (a) a ticket generator configured to generate and provide a ticket or credit slip representing a payout, wherein the ticket or credit slip may be redeemed via a cashier, a kiosk, or other suitable redemption system; (b) a note generator configured to provide paper currency; (c) a coin generator configured to provide coins or tokens in a coin payout tray; and (d) any suitable combination thereof. The example EGMs illustrated in FIGS. 4A and 4B each include ticket generator 1136. In one embodiment, the EGM includes a payout device configured to fund an electronically recordable identification card or smart card or a bank account via an electronic funds transfer.
In certain embodiments, one output device of the EGM is a sound generating device controlled by one or more sound cards. In one such embodiment, the sound generating device includes one or more speakers or other sound generating hardware and/or software for generating sounds, such as by playing music for any games or by playing music for other modes of the EGM, such as an attract mode. The example EGMs illustrated in FIGS. 4A and 4B each include a plurality of speakers 1150. In another such embodiment, the EGM provides dynamic sounds coupled with attractive multimedia images displayed on one or more of the display devices to provide an audio-visual representation or to otherwise display full-motion video with sound to attract players to the EGM. In certain embodiments, the EGM displays a sequence of audio and/or visual attraction messages during idle periods to attract potential players to the EGM. The videos may be customized to provide any appropriate information.
In various embodiments, the EGM includes a plurality of communication ports configured to enable the at least one processor of the EGM to communicate with and to operate with external peripherals, such as: accelerometers, arcade sticks, bar code readers, bill validators, biometric input devices, bonus devices, button panels, card readers, coin dispensers, coin hoppers, display screens or other displays or video sources, expansion buses, information panels, keypads, lights, mass storage devices, microphones, motion sensors, motors, printers, reels, SCSI ports, solenoids, speakers, thumbsticks, ticket readers, touch screens, trackballs, touchpads, wheels, and wireless communication devices. At least U.S. Patent Application Publication No. 2004/0254014 describes a variety of EGMs including one or more communication ports that enable the EGMs to communicate and operate with one or more external peripherals.
As generally described above, in certain embodiments, such as the example EGMs illustrated in FIGS. 4A and 4B, the EGM has a support structure, housing, or cabinet that provides support for a plurality of the input device and the output devices of the EGM. Further, the EGM is configured such that a player may operate it while standing or sitting. In various embodiments, the EGM is positioned on a base or stand, or is configured as a pub-style tabletop game (not shown) that a player may operate typically while sitting. As illustrated by the different example EGMs shown in FIGS. 4A and 4B, EGMs may have varying cabinet and display configurations.
It should be appreciated that, in certain embodiments, the EGM is a device that has obtained approval from a regulatory gaming commission, and in other embodiments, the EGM is a device that has not obtained approval from a regulatory gaming commission.
As explained above, for brevity and clarity, both the EGMs and the personal gaming devices of the present disclosure are collectively referred to herein as “EGMs.” Accordingly, it should be appreciated that certain of the example EGMs described above include certain elements that may not be included in all EGMs. For example, the payment device of a personal gaming device such as a mobile telephone may not include a coin acceptor, while in certain instances the payment device of an EGM located in a gaming establishment may include a coin acceptor.
Operation of Primary or Base Games and/or Secondary or Bonus Games
In various embodiments, an EGM may be implemented in one of a variety of different configurations. In various embodiments, the EGM may be implemented as one of: (a) a dedicated EGM wherein computerized game programs executable by the EGM for controlling any primary or base games (referred to herein as “primary games”) and/or any secondary or bonus games or other functions (referred to herein as “secondary games”) displayed by the EGM are provided with the EGM prior to delivery to a gaming establishment or prior to being provided to a player; and (b) a changeable EGM wherein computerized game programs executable by the EGM for controlling any primary games and/or secondary games displayed by the EGM are downloadable to the EGM through a data network or remote communication link after the EGM is physically located in a gaming establishment or after the EGM is provided to a player.
As generally explained above, in various embodiments in which the gaming system includes a central server, central controller, or remote host and a changeable EGM, the at least one memory device of the central server, central controller, or remote host stores different game programs and instructions executable by the at least one processor of the changeable EGM to control one or more primary games and/or secondary games displayed by the changeable EGM. More specifically, each such executable game program represents a different game or a different type of game that the at least one changeable EGM is configured to operate. In one example, certain of the game programs are executable by the changeable EGM to operate games having the same or substantially the same game play but different paytables. In different embodiments, each executable game program is associated with a primary game, a secondary game, or both. In certain embodiments, an executable game program is executable by the at least one processor of the at least one changeable EGM as a secondary game to be played simultaneously with a play of a primary game (which may be downloaded to or otherwise stored on the at least one changeable EGM), or vice versa.
In operation of such embodiments, the central server, central controller, or remote host is configured to communicate one or more of the stored executable game programs to the at least one processor of the changeable EGM. In different embodiments, a stored executable game program is communicated or delivered to the at least one processor of the changeable EGM by: (a) embedding the executable game program in a device or a component (such as a microchip to be inserted into the changeable EGM); (b) writing the executable game program onto a disc or other media; or (c) uploading or streaming the executable game program over a data network (such as a dedicated data network). After the executable game program is communicated from the central server, central controller, or remote host to the changeable EGM, the at least one processor of the changeable EGM executes the executable game program to enable the primary game and/or the secondary game associated with that executable game program to be played using the display device(s) and/or the input device(s) of the changeable EGM. That is, when an executable game program is communicated to the at least one processor of the changeable EGM, the at least one processor of the changeable EGM changes the game or the type of game that may be played using the changeable EGM.
In certain embodiments, the gaming system randomly determines any game outcome(s) (such as a win outcome) and/or award(s) (such as a quantity of credits to award for the win outcome) for a play of a primary game and/or a play of a secondary game based on probability data. In certain such embodiments, this random determination is provided through utilization of an RNG, such as a true RNG or a pseudo RNG, or any other suitable randomization process. In one such embodiment, each game outcome or award is associated with a probability, and the gaming system generates the game outcome(s) and/or the award(s) to be provided based on the associated probabilities. In these embodiments, since the gaming system generates game outcomes and/or awards randomly or based on one or more probability calculations, there is no certainty that the gaming system will ever provide any specific game outcome and/or award.
In certain embodiments, the gaming system maintains one or more predetermined pools or sets of predetermined game outcomes and/or awards. In certain such embodiments, upon generation or receipt of a game outcome and/or award request, the gaming system independently selects one of the predetermined game outcomes and/or awards from the one or more pools or sets. The gaming system flags or marks the selected game outcome and/or award as used. Once a game outcome or an award is flagged as used, it is prevented from further selection from its respective pool or set; that is, the gaming system does not select that game outcome or award upon another game outcome and/or award request. The gaming system provides the selected game outcome and/or award. At least U.S. Pat. Nos. 7,470,183; 7,563,163; and 7,833,092 and U.S. Patent Application Publication Nos. 2005/0148382, 2006/0094509, and 2009/0181743 describe various examples of this type of award determination.
In certain embodiments, the gaming system determines a predetermined game outcome and/or award based on the results of a bingo, keno, or lottery game. In certain such embodiments, the gaming system utilizes one or more bingo, keno, or lottery games to determine the predetermined game outcome and/or award provided for a primary game and/or a secondary game. The gaming system is provided or associated with a bingo card. Each bingo card consists of a matrix or array of elements, wherein each element is designated with separate indicia. After a bingo card is provided, the gaming system randomly selects or draws a plurality of the elements. As each element is selected, a determination is made as to whether the selected element is present on the bingo card. If the selected element is present on the bingo card, that selected element on the provided bingo card is marked or flagged. This process of selecting elements and marking any selected elements on the provided bingo cards continues until one or more predetermined patterns are marked on one or more of the provided bingo cards. After one or more predetermined patterns are marked on one or more of the provided bingo cards, game outcome and/or award is determined based, at least in part, on the selected elements on the provided bingo cards. At least U.S. Pat. Nos. 7,753,774; 7,731,581; 7,955,170; and 8,070,579 and U.S. Patent Application Publication No. 2011/0028201 describe various examples of this type of award determination.
In certain embodiments in which the gaming system includes a central server, central controller, or remote host and an EGM, the EGM is configured to communicate with the central server, central controller, or remote host for monitoring purposes only. In such embodiments, the EGM determines the game outcome(s) and/or award(s) to be provided in any of the manners described above, and the central server, central controller, or remote host monitors the activities and events occurring on the EGM. In one such embodiment, the gaming system includes a real-time or online accounting and gaming information system configured to communicate with the central server, central controller, or remote host. In this embodiment, the accounting and gaming information system includes: (a) a player database for storing player profiles, (b) a player tracking module for tracking players (as described below), and (c) a credit system for providing automated transactions. At least U.S. Pat. No. 6,913,534 and U.S. Patent Application Publication No. 2006/0281561 describe various examples of such accounting systems.
As noted above, in various embodiments, the gaming system includes one or more executable game programs executable by at least one processor of the gaming system to provide one or more primary games and one or more secondary games. The primary game(s) and the secondary game(s) may comprise any suitable games and/or wagering games, such as, but not limited to: electro-mechanical or video slot or spinning reel type games; video card games such as video draw poker, multi-hand video draw poker, other video poker games, video blackjack games, and video baccarat games; video keno games; video bingo games; and video selection games.
In certain embodiments in which the primary game is a slot or spinning reel type game, the gaming system includes one or more reels in either an electromechanical form with mechanical rotating reels or in a video form with simulated reels and movement thereof. Each reel displays a plurality of indicia or symbols, such as bells, hearts, fruits, numbers, letters, bars, or other images that typically correspond to a theme associated with the gaming system. In certain such embodiments, the gaming system includes one or more paylines associated with the reels. The example EGMs shown in FIGS. 4A and 4B each include a payline 1152 and a plurality of reels 1156. In certain embodiments, one or more of the reels are independent reels or unisymbol reels. In such embodiments, each independent reel generates and displays one symbol.
In various embodiments, one or more of the paylines is horizontal, vertical, circular, diagonal, angled, or any suitable combination thereof. In other embodiments, each of one or more of the paylines is associated with a plurality of adjacent symbol display positions on a requisite number of adjacent reels. In one such embodiment, one or more paylines are formed between at least two symbol display positions that are adjacent to each other by either sharing a common side or sharing a common corner (i.e., such paylines are connected paylines). The gaming system enables a wager to be placed on one or more of such paylines to activate such paylines. In other embodiments in which one or more paylines are formed between at least two adjacent symbol display positions, the gaming system enables a wager to be placed on a plurality of symbol display positions, which activates those symbol display positions.
In various embodiments, the gaming system provides one or more awards after a spin of the reels when specified types and/or configurations of the indicia or symbols on the reels occur on an active payline or otherwise occur in a winning pattern, occur on the requisite number of adjacent reels, and/or occur in a scatter pay arrangement.
In certain embodiments, the gaming system employs a ways to win award determination. In these embodiments, any outcome to be provided is determined based on a number of associated symbols that are generated in active symbol display positions on the requisite number of adjacent reels (i.e., not on paylines passing through any displayed winning symbol combinations). If a winning symbol combination is generated on the reels, one award for that occurrence of the generated winning symbol combination is provided. At least U.S. Pat. No. 8,012,011 and U.S. Patent Application Publication Nos. 2008/0108408 and 2008/0132320 describe various examples of ways to win award determinations.
In various embodiments, the gaming system includes a progressive award. Typically, a progressive award includes an initial amount and an additional amount funded through a portion of each wager placed to initiate a play of a primary game. When one or more triggering events occurs, the gaming system provides at least a portion of the progressive award. After the gaming system provides the progressive award, an amount of the progressive award is reset to the initial amount and a portion of each subsequent wager is allocated to the next progressive award. At least U.S. Pat. Nos. 5,766,079; 7,585,223; 7,651,392; 7,666,093; 7,780,523; and 7,905,778 and U.S. Patent Application Publication Nos. 2008/0020846, 2009/0123364, 2009/0123363, and 2010/0227677 describe various examples of different progressive gaming systems.
As generally noted above, in addition to providing winning credits or other awards for one or more plays of the primary game(s), in various embodiments the gaming system provides credits or other awards for one or more plays of one or more secondary games. The secondary game typically enables a prize or payout in to be obtained addition to any prize or payout obtained through play of the primary game(s). The secondary game(s) typically produces a higher level of player excitement than the primary game(s) because the secondary game(s) provides a greater expectation of winning than the primary game(s) and is accompanied with more attractive or unusual features than the primary game(s). It should be appreciated that the secondary game(s) may be any type of suitable game, either similar to or completely different from the primary game.
In various embodiments, the gaming system automatically provides or initiates the secondary game upon the occurrence of a triggering event or the satisfaction of a qualifying condition. In other embodiments, the gaming system initiates the secondary game upon the occurrence of the triggering event or the satisfaction of the qualifying condition and upon receipt of an initiation input. In certain embodiments, the triggering event or qualifying condition is a selected outcome in the primary game(s) or a particular arrangement of one or more indicia on a display device for a play of the primary game(s), such as a “BONUS” symbol appearing on three adjacent reels along a payline following a spin of the reels for a play of the primary game. In other embodiments, the triggering event or qualifying condition occurs based on a certain amount of game play (such as number of games, number of credits, amount of time) being exceeded, or based on a specified number of points being earned during game play. It should be appreciated that any suitable triggering event or qualifying condition or any suitable combination of a plurality of different triggering events or qualifying conditions may be employed.
In other embodiments, at least one processor of the gaming system randomly determines when to provide one or more plays of one or more secondary games. In one such embodiment, no apparent reason is provided for the providing of the secondary game. In this embodiment, qualifying for a secondary game is not triggered by the occurrence of an event in any primary game or based specifically on any of the plays of any primary game. That is, qualification is provided without any explanation or, alternatively, with a simple explanation. In another such embodiment, the gaming system determines qualification for a secondary game at least partially based on a game triggered or symbol triggered event, such as at least partially based on play of a primary game.
In various embodiments, after qualification for a secondary game has been determined, the secondary game participation may be enhanced through continued play on the primary game. Thus, in certain embodiments, for each secondary game qualifying event, such as a secondary game symbol, that is obtained, a given number of secondary game wagering points or credits is accumulated in a “secondary game meter” configured to accrue the secondary game wagering credits or entries toward eventual participation in the secondary game. In one such embodiment, the occurrence of multiple such secondary game qualifying events in the primary game results in an arithmetic or exponential increase in the number of secondary game wagering credits awarded. In another such embodiment, any extra secondary game wagering credits may be redeemed during the secondary game to extend play of the secondary game.
In certain embodiments, no separate entry fee or buy-in for the secondary game is required. That is, entry into the secondary game cannot be purchased; rather, in these embodiments entry must be won or earned through play of the primary game, thereby encouraging play of the primary game. In other embodiments, qualification for the secondary game is accomplished through a simple “buy-in.” For example, qualification through other specified activities is unsuccessful, payment of a fee or placement of an additional wager “buys-in” to the secondary game. In certain embodiments, a separate side wager must be placed on the secondary game or a wager of a designated amount must be placed on the primary game to enable qualification for the secondary game. In these embodiments, the secondary game triggering event must occur and the side wager (or designated primary game wager amount) must have been placed for the secondary game to trigger.
In various embodiments in which the gaming system includes a plurality of EGMs, the EGMs are configured to communicate with one another to provide a group gaming environment. In certain such embodiments, the EGMs enable players of those EGMs to work in conjunction with one another, such as by enabling the players to play together as a team or group, to win one or more awards. In other such embodiments, the EGMs enable players of those EGMs to compete against one another for one or more awards. In one such embodiment, the EGMs enable the players of those EGMs to participate in one or more gaming tournaments for one or more awards. At least U.S. Patent Application Publication Nos. 2007/0123341, 2008/0070680, 2008/0176650, and 2009/0124363 describe various examples of different group gaming systems.
In various embodiments, the gaming system includes one or more player tracking systems. Such player tracking systems enable operators of the gaming system (such as casinos or other gaming establishments) to recognize the value of customer loyalty by identifying frequent customers and rewarding them for their patronage. Such a player tracking system is configured to track a player's gaming activity. In one such embodiment, the player tracking system does so through the use of player tracking cards. In this embodiment, a player is issued a player identification card that has an encoded player identification number that uniquely identifies the player. When the player's playing tracking card is inserted into a card reader of the gaming system to begin a gaming session, the card reader reads the player identification number off the player tracking card to identify the player. The gaming system timely tracks any suitable information or data relating to the identified player's gaming session. The gaming system also timely tracks when the player tracking card is removed to conclude play for that gaming session. In another embodiment, rather than requiring insertion of a player tracking card into the card reader, the gaming system utilizes one or more portable devices, such as a cell phone, a radio frequency identification tag, or any other suitable wireless device, to track when a gaming session begins and ends. In another embodiment, the gaming system utilizes any suitable biometric technology or ticket technology to track when a gaming session begins and ends.
In such embodiments, during one or more gaming sessions, the gaming system tracks any suitable information or data, such as any amounts wagered, average wager amounts, and/or the time at which these wagers are placed. In different embodiments, for one or more players, the player tracking system includes the player's account number, the player's card number, the player's first name, the player's surname, the player's preferred name, the player's player tracking ranking, any promotion status associated with the player's player tracking card, the player's address, the player's birthday, the player's anniversary, the player's recent gaming sessions, or any other suitable data. In various embodiments, such tracked information and/or any suitable feature associated with the player tracking system is displayed on a player tracking display. In various embodiments, such tracked information and/or any suitable feature associated with the player tracking system is displayed via one or more service windows that are displayed on the central display device and/or the upper display device. At least U.S. Pat. Nos. 6,722,985; 6,908,387; 7,311,605; 7,611,411; 7,617,151; and 8,057,298 describe various examples of player tracking systems.
It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present subject matter and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.

## Claims

1. A gaming system comprising:
a housing;
at least one display device supported by the housing;
a plurality of input devices supported by the housing, said plurality of input devices including:
(i) an acceptor, and
(ii) a cashout device;

at least one processor; and
at least one memory device which stores a plurality of instructions, which when executed by the at least one processor, cause the at least one processor to operate with the at least one display device and the plurality of input devices to:
(a) if a physical item is received via the acceptor, establish a credit balance based, at least in part, on a monetary value associated with the received physical item,
(b) display one of a plurality of symbols at each of a plurality of symbol display positions of each of a plurality of symbol display position matrices, wherein:
(i) at least a first one of the symbol display positions of a first one of the symbol display position matrices is linked to at least a first one of the symbol display positions of a second one of the symbol display position matrices, and
(ii) the display of each of the symbols for each symbol display position matrix is independent from the display of any of the symbols for any of the other symbol display position matrices,

(c) for each symbol display position matrix:
(i) determine if any of the symbols displayed at the symbol display positions of said symbol display position matrix form any winning symbol combinations, and
(ii) if a plurality of the displayed symbols form at least one winning symbol combination, display one of a plurality of awards for each displayed winning symbol combination,

(d) determine whether each displayed symbol qualifies to be removed,
(e) if at least one of the displayed symbols qualifies to be removed:
(i) for each displayed symbol that qualifies to be removed, remove said symbol,
(ii) determine a repositioning direction from a plurality of different repositioning directions, said determination being based on at least one of any remaining displayed symbols, any created empty symbol display positions, a quantity of any remaining displayed symbols, a quantity of any created empty symbol display positions, and an average expected payout associated with any of said plurality of different reposition directions,
(iii) reposition a quantity of any remaining displayed symbols in the determined repositioning direction, wherein:
(A) a first one of the repositioning directions is associated with repositioning any remaining displayed symbols from the first one of the symbol display positions of the first one of the symbol display position matrices toward at least the first one of any empty linked symbol display positions of the second one of the symbol display position matrices, and
(B) a second, different one of the repositioning directions is associated with repositioning any remaining displayed symbols from the first one of the symbol display positions of the second one of the symbol display position matrices toward at least the first one of any empty linked symbol display positions of the first one of the symbol display position matrices,

(iv) for each created empty symbol display position, display one of the plurality of symbols, and
(v) repeat (c) to (e) at least once, and

(f) if a cashout input is received via the cashout device, cause an initiation of any payout associated with the credit balance.

2. The gaming system of claim 1, wherein the repositioned quantity of any remaining displayed symbols is zero.

3. The gaming system of claim 1, wherein when executed by the at least one processor if at least one of the displayed symbols qualifies to be removed, the plurality of instructions cause the at least one processor to repeat (c) to (e) until no symbols qualify to be removed.

4. The gaming system of claim 1, wherein when executed by the at least one processor, the plurality of instructions cause the at least one processor to determine the repositioning direction based on at least one selected from the group consisting of: at least one of any remaining displayed symbols from at least one of the symbol display positions of the first one of the symbol display position matrices, at least one of any remaining displayed symbols from at least one of the symbol display positions of the second one of the symbol display position matrices, at least one created empty symbol display position of the first one of the symbol display position matrices, at least one created empty symbol display position of the second one of the symbol display position matrices, a quantity of any remaining displayed symbols of the first one of the symbol display position matrices, a quantity of any remaining displayed symbols of the second one of the symbol display position matrices, a quantity of any created empty symbol display positions of the first one of the symbol display position matrices, a quantity of any created empty symbol display positions of the second one of the symbol display position matrices, an average expected payout associated with the first one of the repositioning directions, and an average expected payout associated with the second one of the repositioning directions.

5. The gaming system of claim 1, wherein when executed by the at least one processor if at least the first one of the symbol display positions of the first one of the symbol display position matrices is empty and at least the first one of the linked symbol display positions of the second one of the symbol display position matrices is empty, the plurality of instructions cause the at least one processor to:
(i) reposition any remaining displayed symbols from the first one of the symbol display positions of the first one of the symbol display position matrices to at least the first empty one of the linked symbol display positions of the second one of the symbol display position matrices if the first one of the repositioning directions is determined, and
(ii) reposition any remaining displayed symbols from the first one of the symbol display positions of the second one of the symbol display position matrices to at least the first empty one of the linked symbol display positions of the first one of the symbol display position matrices if the second one of the repositioning directions is determined.

6. The gaming system of claim 1, wherein when executed by the at least one processor if at least the first one of the symbol display positions of the first one of the symbol display position matrices is empty, and none of the linked symbol display positions of the second one of the symbol display position matrices are empty, the plurality of instructions cause the at least one processor to:
reposition any remaining displayed symbols from the first one of the symbol display positions of the second one of the symbol display position matrices to any empty symbol display positions of the second one of the symbol display position matrices if the first one of the repositioning directions is determined, and
(ii) reposition any remaining displayed symbols from the first one of the symbol display positions of the second one of the symbol display position matrices to at least the first empty one of the linked symbol display positions of the first one of the symbol display position matrices if the second one of the repositioning directions is determined.

7. The gaming system of claim 1, wherein when executed by the at least one processor, the plurality of instructions cause the at least one processor to enable a player to wager on a play of a game associated with each of the plurality of symbol display position matrices.

8. The gaming system of claim 1, wherein when executed by the at least one processor, the plurality of instructions cause the at least one processor to enable a player to individually wager on a play of each of a plurality of games, each game being individually associated with one of the plurality of symbol display position matrices.

9. The gaming system of claim 1, wherein the plurality of awards include at least one selected from the group consisting of: a quantity of monetary credits, a quantity of non-monetary credits, a quantity of promotional credits, a quantity of player tracking points, a progressive award, a modifier, a quantity of free plays of the game, a quantity of plays of at least one non-wagering game, at least one lottery based award, a wager match for at least one play of the game, an increase in an average expected payback percentage of the game, at least one comp, a quantity of credits usable for an online play of an online game, a quantity of virtual goods and an access code usable to unlock content on an internet.

10. A method of operating a gaming system, said method comprising:
(a) causing at least one display device to display one of a plurality of symbols at each of a plurality of symbol display positions of each of a plurality of symbol display position matrices, wherein:
(i) at least a first one of the symbol display positions of a first one of the symbol display position matrices is linked to at least a first one of the symbol display positions of a second one of the symbol display position matrices, and
(ii) the display of each of the symbols for each symbol display position matrix is independent from the display of any of the symbols for any of the other symbol display position matrices,

(b) for each symbol display position matrix:
(i) causing at least one processor to execute a plurality of instructions to determine if any of the symbols displayed at the symbol display positions of said symbol display position matrix form any winning symbol combinations, and
(ii) if a plurality of the displayed symbols form at least one winning symbol combination, causing the at least one display device to display one of a plurality of awards for each displayed winning symbol combination, wherein a credit balance is increasable based on any award displayed for any displayed winning symbol combination, said credit balance being increasable via an acceptor of a physical item associated with a monetary value, and said credit balance being decreasable via a cashout device,

(c) causing the at least one processor to execute the plurality of instructions to determine whether each displayed symbol qualifies to be removed, and
(d) if at least one of the displayed symbols qualifies to be removed:
(i) for each displayed symbol that qualifies to be removed, causing the at least one processor to execute the plurality of instructions to remove said symbol,
(ii) causing the at least one processor to execute the plurality of instructions to determine a repositioning direction from a plurality of different repositioning directions, said determination being based on at least one of any remaining displayed symbols, any created empty symbol display positions, a quantity of any remaining displayed symbols, a quantity of any created empty symbol display positions, and an average expected payout associated with any of said plurality of different reposition directions,
(iii) causing the at least one processor to execute the plurality of instructions to reposition a quantity of any remaining displayed symbols in the determined repositioning direction, wherein:
(A) a first one of the repositioning directions is associated with repositioning any remaining displayed symbols from the first one of the symbol display positions of the first one of the symbol display position matrices toward at least the first one of any empty linked symbol display positions of the second one of the symbol display position matrices, and
(B) a second, different one of the repositioning directions is associated with repositioning any remaining displayed symbols from the first one of the symbol display positions of the second one of the symbol display position matrices toward at least the first one of any empty linked symbol display positions of the first one of the symbol display position matrices,

(iv) for each created empty symbol display position, causing the at least one display device to display one of the plurality of symbols, and
(v) repeating (b) to (d) at least once.

11. The method of claim 10, wherein the repositioned quantity of any remaining displayed symbols is zero.

12. The method of claim 10, which includes, if at least one of the displayed symbols qualifies to be removed, repeating (b) to (d) until no symbols qualify to be removed.

13. The method of claim 10, which includes causing the at least one processor to execute the plurality of instructions to determine the repositioning direction based on at least one selected from the group consisting of: at least one of any remaining displayed symbols from at least one of the symbol display positions of the first one of the symbol display position matrices, at least one of any remaining displayed symbols from at least one of the symbol display positions of the second one of the symbol display position matrices, at least one created empty symbol display position of the first one of the symbol display position matrices, at least one created empty symbol display position of the second one of the symbol display position matrices, a quantity of any remaining displayed symbols of the first one of the symbol display position matrices, a quantity of any remaining displayed symbols of the second one of the symbol display position matrices, a quantity of any created empty symbol display positions of the first one of the symbol display position matrices, a quantity of any created empty symbol display positions of the second one of the symbol display position matrices, an average expected payout associated with the first one of the repositioning directions, and an average expected payout associated with the second one of the repositioning directions.

14. The method of claim 10, which includes, if at least the first one of the symbol display positions of the first one of the symbol display position matrices is empty and at least the first one of the linked symbol display positions of the second one of the symbol display position matrices is empty:
(i) causing the at least one processor to execute the plurality of instructions to reposition any remaining displayed symbols from the first one of the symbol display positions of the first one of the symbol display position matrices to at least the first empty one of the linked symbol display positions of the second one of the symbol display position matrices if the first one of the repositioning directions is determined, and
(ii) causing the at least one processor to execute the plurality of instructions to reposition any remaining displayed symbols from the first one of the symbol display positions of the second one of the symbol display position matrices to at least the first empty one of the linked symbol display positions of the first one of the symbol display position matrices if the second one of the repositioning directions is determined.

15. The method of claim 10, which includes if at least the first one of the symbol display positions of the first one of the symbol display position matrices is empty, and none of the linked symbol display positions of the second one of the symbol display position matrices are empty:
(i) causing the at least one processor to execute the plurality of instructions to reposition any remaining displayed symbols from the first one of the symbol display positions of the second one of the symbol display position matrices to any empty symbol display positions of the second one of the symbol display position matrices if the first one of the repositioning directions is determined, and
(ii) causing the at least one processor to execute the plurality of instructions to reposition any remaining displayed symbols from the first one of the symbol display positions of the second one of the symbol display position matrices to at least the first empty one of the linked symbol display positions of the first one of the symbol display position matrices if the second one of the repositioning directions is determined.

16. The method of claim 10, which includes enabling a player to wager on a play of a game associated with each of the plurality of symbol display position matrices.

17. The method of claim 10, which includes enabling a player to individually wager on a play of each of a plurality of games, each game being individually associated with one of the plurality of symbol display position matrices.

18. The method of claim 10, wherein the plurality of awards include at least one selected from the group consisting of: a quantity of monetary credits, a quantity of non-monetary credits, a quantity of promotional credits, a quantity of player tracking points, a progressive award, a modifier, a quantity of free plays of the game, a quantity of plays of at least one non-wagering game, at least one lottery based award, a wager match for at least one play of the game, an increase in an average expected payback percentage of the game, at least one comp, a quantity of credits usable for an online play of an online game, a quantity of virtual goods and an access code usable to unlock content on an internet.

19. The method of claim 10, which is executed through a data network.

20. The method of claim 19, wherein the data network is an internet.