# Patent

## Title
Gaming device having persistently extending wild symbols

## Abstract

The present disclosure relates broadly to a gaming device operable under control of a processor together with a method of operating a gaming device. The disclosure relates particularly, although not exclusively, to a gaming device and method where a wild symbol is in the course of a plurality of games extends along at least one of a plurality of symbol reels.

## Background
PRIORITY CLAIM
This application claims the benefit of and priority to Australian Provisional Patent Application No. 2012900974, filed on Mar. 12, 2012, the entire contents of which is incorporated by reference herein.
BACKGROUND
Various slot gaming machines are known. Slot gaming machines generally include a plurality of reels. Each reel includes a plurality of symbols. The reels spin after a player places a wager on the game. The reels spin and then stop to display generated combinations of symbols on the reels. If a generated symbol or combination of symbols is a winning symbol or combination of symbols associated with an award, the player receives that award when the generated symbol or combination of symbols appears along an active payline associated with the reels or in a scatter pay. Players can become frustrated if they almost win an award when the symbols necessary for a winning combination substantially appear on the reels but are missing a symbol or are not in the proper configuration or order to produce a winning combination.
One popular game feature which attempts to resolve such frustration in these situations and increase the player's award opportunities is a wild symbol. A wild symbol changes, replaces or functions as one of the symbols on one of the reels after the reels initially spin and stop. This enables the game to change a first or non-winning combination of symbols to a second and possibly winning combination of symbols, for example, to make a winning combination or align a winning combination on an active payline.
SUMMARY
The present disclosure relates broadly to a gaming device operable under control of a processor together with a method of operating a gaming device. The disclosure relates particularly, although not exclusively, to a gaming device and method where a wild symbol is in the course of a plurality of games extends along at least one of a plurality of symbol reels.
According to one aspect of the present disclosure there is provided a gaming device operable under control of a processor, said gaming device comprising:

    
    
        a plurality of games operable by a player;
        a plurality of reels each including a plurality of symbol positions associated with respective of designated symbols and at least one of the designated symbols being a wild symbol whereby the processor is programmed to:
        
            (i) in an initial of the plurality of games, determine at least one of the reels from the plurality of reels on which the wild symbol is to display in one of the symbol positions;
            (ii) extend said displayed wild symbol to one or more other symbol positions of the at least one determined reels;
            (iii) determine if any winning symbols or symbol combinations occurred on the plurality of reels in an initial award evaluation in said initial of the games;
            (iv) in a subsequent of the plurality of games, determine if at least one of the extended wild symbols in the one or more other symbol positions from the initial game is to display in the subsequent game;
            (v) continue to extend any displayed of the extended wild symbols from said subsequent of the games to one or more further symbol positions of the at least one determined reels;
            (vi) determine if any winning symbols or symbol combinations occurred on the plurality of reels in a subsequent award evaluation in said subsequent of the games.
        
        
    
    


In one embodiment, the processor is programmed to extend the displayed wild symbols by replicating said wild symbol in the other symbol position. In one such embodiment, the other symbol positions in which the wild symbols are replicated are adjacent one another. In another such embodiment, the further symbol positions in which the wild symbols are replicated are adjacent said one of the symbol positions in which the wild symbol is displayed in said initial of the games. Alternatively the processor is programmed to extend the displayed wild symbols by expanding the wild symbol along the other symbol positions being adjacent said one of the symbol positions and adjacent one another.
In one embodiment, the processor is programmed to extend the displayed wild symbols by persistently extending the wild symbols in subsequent of a series of the plurality of games. In one such embodiment, the persistently extended wild symbols progressively wrap around the determined reel.
In one embodiment, the processor is programmed in the initial game to extend the displayed wild symbols along all visible of the other symbol positions of the determined reels. In one such embodiment, the displayed wild symbols in the subsequent game extends along all visible of the further symbol positions of the determined reels.
In one embodiment, the processor is programmed to reset the extended wild symbols following a predetermined number or quantity of the plurality of games wherein the determined reel is reverted to its designed symbols at respective of its symbol positions. In one such embodiment, the predetermined number or quantity of the plurality of games is equal to the number or quantity of games triggered in a base game.
According to another aspect of the disclosure there is provided a method of operating a gaming device, said method comprising:

    
    
        displaying a game operable by a player;
        displaying a plurality of reels in association with the game, each of the plurality of reels including a plurality of symbol positions associated with respective of designated symbols including at least one wild symbol;
        displaying the designated symbols;
        in an initial of a plurality of the games, determining at least one of the reels from the plurality of reels on which the wild symbol is to display in one of the plurality of symbol positions;
        extending said displayed wild symbol to one or more other symbol positions of the at least one determined reels;
        determining if any winning symbols or symbol combinations occurred on the plurality of reels in an initial award evaluation in said initial of the games;
        in a subsequent of the plurality of games, determining if at least one of the extended wild symbols in the one or more other symbol positions from the initial game is to display in the subsequent game;
        continuing to extend the displayed of the extended wild symbols from said subsequent of the games to one or more further symbol positions of the at least one determined reels;
        determining if any winning symbols or symbol combinations occurred on the plurality of reels in a subsequent award evaluation in said subsequent of the games.
    
    


In one embodiment, the step of extending the displayed wild symbols involves replicating said wild symbol in the other or further symbol position. Alternatively the displayed wild symbols are expanded along the other symbol positions being adjacent said one of the symbol positions and adjacent one another.
In one embodiment, the step of extending the displayed wild symbols involves persistently extending the wild symbols in subsequent of a series of the plurality of games. In one such embodiment, the persistently extended wild symbols progressively wrap around the determined reel.
In one embodiment, the step of extending the displayed wild symbols in the initial game involves extending the displayed wild symbols along all visible of the other symbol positions of the determined reels. In one such embodiment, the displayed wild symbols in the subsequent game are extended along all visible of the further symbol positions of the determined reels.
In one embodiment, the method also comprises resetting the extended wild symbols following a predetermined number or quantity of the plurality of games wherein the determined reel is reverted to it designated symbols at respective of its symbol positions.
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. 1A is a perspective view of one embodiment of the gaming device disclosed herein.
FIG. 1B is a perspective view of an alternative embodiment of the gaming device disclosed herein.
FIG. 2A is a schematic block diagram of the electronic configuration of one embodiment of the gaming device disclosed herein.
FIG. 2B is a schematic block diagram illustrating a plurality of gaming terminals in communication with a central controller.
FIG. 3 is a front view of a display device of one embodiment of the gaming device according to the disclosure where in a subsequent game the display device displays a plurality of symbols on a plurality of reels.
FIGS. 4A and 4B are front views of the display device of the embodiment of FIG. 3 showing the centre reel only where in an initial game the display device displays a plurality of symbols on the centre reel.
FIGS. 5A and 5B are front views of the display device of the embodiment of FIG. 3 showing the centre reel only wherein in a subsequent game the display device displays a plurality of symbols on the centre reel.



DETAILED DESCRIPTION
Two example alternative embodiments of the gaming device of the disclosed herein are illustrated in FIGS. 1A and 1B as gaming device 10a and gaming device 10b, respectively. Gaming device 10a and/or gaming device 10b are generally referred to herein as gaming device 10.
In the embodiments illustrated in FIGS. 1A and 1B, gaming device 10 has a support structure, housing or cabinet which provides support for a plurality of displays, inputs, controls and other features of a conventional gaming machine. It is configured so that a player can operate it while standing or sitting. The gaming device may be positioned on a base or stand or can be configured as a pub-style table-top game (not shown) which a player can operate preferably while sitting. As illustrated by the different configurations shown in FIGS. 1A and 1B, the gaming device may have varying cabinet and display configurations.
In one embodiment, as illustrated in FIG. 2A, the gaming device preferably includes at least one processor 12, such as a microprocessor, a microcontroller-based platform, a suitable integrated circuit or one or more application-specific integrated circuits (ASIC's). The processor is in communication with or operable to access or to exchange signals with at least one data storage or memory device 14. In one embodiment, the processor and the memory device reside within the cabinet of the gaming device. The memory device stores program code and instructions, executable by the processor, to control the gaming device. The memory device also stores other data such as image data, event data, player input data, random or pseudo-random number generators, pay-table data or information and applicable game rules that relate to the play of the gaming device. In one embodiment, the memory device includes random access memory (RAM), which can include non-volatile RAM (NVRAM), magnetic RAM (MRAM), ferroelectric RAM (FeRAM) and other forms as understood in the gaming industry. In one embodiment, the memory device includes read only memory (ROM). In one embodiment, the memory device includes flash memory and/or EEPROM (electrically erasable programmable read only memory). Any other suitable magnetic, optical and/or semiconductor memory may operate in conjunction with the gaming device disclosed herein.
In one embodiment, part or all of the program code and/or operating data described above can be stored in a detachable or removable memory device, including, but not limited to, a suitable cartridge, disk, CD ROM, DVD or USB memory device. In other embodiments, part or all of the program code and/or operating data described above can be downloaded to the memory device through a suitable network.
In one embodiment, an operator or a player can use such a removable memory device in a desktop computer, a laptop personal computer, a personal digital assistant (PDA), portable computing device, or other computerized platform to implement the present disclosure. In one embodiment, the gaming device or gaming machine disclosed herein is operable over a wireless network, such as part of a wireless gaming system. In this embodiment, the gaming machine may be a hand held device, a mobile device or any other suitable wireless device that enables a player to play any suitable game at a variety of different locations. It should be appreciated that a gaming device or gaming machine as disclosed herein may be a device that has obtained approval from a regulatory gaming commission. It should be appreciated that the processor and memory device may be collectively referred to herein as a “computer” or “controller.”
In one embodiment, as discussed in more detail below, the gaming device randomly generates awards and/or other game outcomes based on probability data. In one such embodiment, this random determination is provided through utilization of a random number generator (RNG), such as a true random number generator, a pseudo random number generator or other suitable randomization process. In one embodiment, each award or other game outcome is associated with a probability and the gaming device generates the award or other game outcome to be provided to the player based on the associated probabilities. In this embodiment, since the gaming device generates outcomes randomly or based upon one or more probability calculations, there is no certainty that the gaming device will ever provide the player with any specific award or other game outcome.
In one embodiment, as illustrated in FIG. 2A, the gaming device includes one or more display devices controlled by the processor. The display devices are preferably connected to or mounted to the cabinet of the gaming device. The embodiment shown in FIG. 1A includes a central display device 16 which displays a primary game. This display device may also display any suitable secondary game associated with the primary game as well as information relating to the primary or secondary game. The alternative embodiment shown in FIG. 1B includes a central display device 16 and an upper display device 18. The upper display device 18 may display the primary game, any suitable secondary game associated or not associated with the primary game and/or information relating to the primary or secondary game. These display devices may also serve as digital glass operable to advertise games or other aspects of the gaming establishment. As seen in FIGS. 1A and 1B, in one embodiment, the gaming device includes a credit display 20 which displays a player's current number of credits, cash, account balance or the equivalent. In one embodiment, the gaming device includes a bet display 22 which displays a player's amount wagered.
The display devices may include, without limitation, a monitor, a television display, a plasma display, a liquid crystal display (LCD) a display based on light emitting diodes (LED), 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 one embodiment, the display device includes a touch-screen with an associated touch-screen controller. The display devices may be of any suitable size and configuration, such as a square, a rectangle or an elongated rectangle.
The display devices of the gaming device are configured to display at least one and preferably a plurality of game or other suitable images, symbols and indicia such as any visual representation or exhibition of the movement of objects such as mechanical, virtual or video reels and wheels, dynamic lighting, video images, images of people, characters, places, things and faces of cards, and the like.
As illustrated in FIG. 2A, in one embodiment, the gaming device includes at least one payment acceptor 24 in communication with the processor. As seen in FIGS. 1A and 1B, the payment acceptor may include a coin slot 26 and a payment, note or bill acceptor 28, where the player inserts money, coins or tokens. The player can place coins in the coin slot or paper money, a ticket or voucher into the payment, note or bill acceptor. In other embodiments, devices such as readers or validators for credit cards, debit cards or credit slips may accept payment. In one embodiment, a player may insert an identification card into a card reader of the gaming device. In one embodiment, the identification card is a smart card having a programmed microchip or a magnetic strip coded with a player's identification, credit totals (or related data) and other relevant information. In another embodiment, a player may carry a portable device, such as a cell phone, a radio frequency identification tag or any other suitable wireless device, which communicates a player's identification, credit totals (or related data) and other relevant information to the gaming device. In one embodiment, money may be transferred to a gaming device through electronic funds transfer. When a player funds the gaming device, the processor determines the amount of funds entered and displays the corresponding amount on the credit or other suitable display as described above.
As seen in FIGS. 1A, 1B and 2A, in one embodiment the gaming device includes at least one and preferably a plurality of input devices 30 in communication with the processor. The input devices can include any suitable device which enables the player to produce an input signal which is received by the processor. In one embodiment, after appropriate funding of the gaming device, the input device is a game activation device, such as a pull arm 32 or a play button 34 which is used by the player to start any primary game or sequence of events in the gaming device. The play button can be any suitable play activator such as a bet one button, a max bet button or a repeat the bet button. In one embodiment, upon appropriate funding, the gaming device begins the game play automatically. In another embodiment, upon the player engaging one of the play buttons, the gaming device automatically activates game play.
In one embodiment, as shown in FIGS. 1A and 1B, one input device is a bet one button 36. The player places a bet by pushing the bet one button. The player can increase the bet by one credit each time the player pushes the bet one button. When the player pushes the bet one button, the number of credits shown in the credit display preferably decreases by one, and the number of credits shown in the bet display preferably increases by one. In another embodiment, one input device is a bet max button (not shown) which enables the player to bet the maximum wager permitted for a game of the gaming device.
In one embodiment, one input device is a cash out button 38. The player may push the cash out button and cash out to receive a cash payment or other suitable form of payment corresponding to the number of remaining credits. In one embodiment, when the player cashes out, the player receives the coins or tokens in a coin payout tray 40. In one embodiment, when the player cashes out, the player may receive other payout mechanisms such as tickets or credit slips redeemable by a cashier for other suitable redemption system) or funding to the player's electronically recordable identification card.
In one embodiment, as mentioned above and seen in FIG. 2A, one input device is a touch-screen 42 coupled with a touch-screen controller 44, or some other touch-sensitive display overlay to allow for player interaction with the images on the display. The touch-screen and the touch-screen controller are connected to a video controller 46. A player can make decisions and input signals into the gaming device by touching the touch-screen at the appropriate places. One such input device is a conventional touch-screen button panel.
In one embodiment, as seen in FIG. 2A, the gaming device includes a sound generating device controlled by one or more sounds cards 48 which function in conjunction with the processor. In one embodiment, the sound generating device includes at least one and preferably a plurality of speakers 50 or other sound generating hardware and/or software for generating sounds, such as playing music for the primary and/or secondary game or for other modes of the gaming device, such as an attract mode. In one embodiment, the gaming device 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 gaming device. During idle periods, the gaming device may display a sequence of audio and/or visual attraction messages to attract potential players to the gaming device. The videos may also be customized for or to provide any appropriate information.
Gaming device 10 can incorporate any suitable wagering primary or base game. The gaming machine or device may include some or all of the features of conventional gaming machines or devices. The primary or base game may comprise any suitable reel-type game, card game, cascading or falling symbol game, number game or other game of chance susceptible to representation in an electronic or electromechanical form, which in one embodiment produces a random outcome based on probability data at the time of or after placement of a wager.
In a cascading or falling symbol game, symbols fall into place in respective symbol positions displayed on the display device of the gaming device. The symbols move or fall from a top of the display device instead of landing in the respective symbol positions as a plurality of reels stop sequentially (e.g., left to right).
In one embodiment, as illustrated in FIGS. 1A and 1B, a base or primary game may be a slot game with one or more paylines 52. The paylines may be horizontal, vertical, circular, diagonal, angled or any combination thereof. In this embodiment, the gaming device includes at least one and preferably a plurality of reels 54, such as three to five reels 54, in either electromechanical form with mechanical rotating reels or video form with simulated reels and movement thereof. In one embodiment, an electromechanical slot machine includes a plurality of adjacent, rotatable reels which may be combined and operably coupled with an electronic display of any suitable type. In another embodiment, if the reels 54 are in video form, one or more of the display devices, as described above, display the plurality of simulated video reels 54. Each reel 54 displays a plurality of indicia or symbols, such as bells, hearts, fruits, numbers, letters, bars or other images which preferably correspond to a theme associated with the gaming device. In another embodiment, one or more of the reels are independent reels or unisymbol reels. In this embodiment, each independent or unisymbol reel generates and displays one symbol to the player. In one embodiment, the gaming device awards prizes after the reels of the primary game stop spinning if specified types and/or configurations of indicia or symbols 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 one embodiment, as illustrated in FIG. 2B, one or more of the gaming devices 10 are in communication with each other and/or at least one central server, central controller or remote host 56 through a data network or remote communication link 58. In this embodiment, the central server, central controller or remote host is any suitable server or computing device which includes at least one processor and at least one memory or storage device. In different such embodiments, the central server is a progressive controller or a processor of one of the gaming devices in the gaming system. In these embodiments, the processor of each gaming device is designed to transmit and receive events, messages, commands or any other suitable data or signal between the individual gaming device and the central server. The gaming device processor is operable to execute such communicated events, messages or commands in conjunction with the operation of the gaming device. Moreover, the processor of the central server is designed to transmit and receive events, messages, commands or any other suitable data or signal between the central server and each of the individual gaming devices. The central server processor is operable to execute such communicated events, messages or commands in conjunction with the operation of the central server. It should be appreciated that one, more or each of the functions of the central controller as disclosed herein may be performed by one or more gaming device processors. It should be further appreciated that one, more or each of the functions of one or more gaming device processors as disclosed herein may be performed by the central controller.
In one embodiment, the game outcome provided to the player is determined by a central server or controller and provided to the player at the gaming device. In this embodiment, each of a plurality of such gaming devices are in communication with the central server or controller. Upon a player initiating game play at one of the gaming devices, the initiated gaming device communicates a game outcome request to the central server or controller.
In one embodiment, the central server or controller receives the game outcome request and randomly generates a game outcome for the primary game based on probability data. In another embodiment, the central server or controller randomly generates a game outcome for the secondary game based on probability data. In another embodiment, the central server or controller randomly generates a game outcome for both the primary game and the secondary game based on probability data. In this embodiment, the central server or controller is capable of storing and utilizing program code or other data similar to the processor and memory device of the gaming device.
The central server or controller communicates the generated or selected game outcome to the initiated gaming device. The gaming device receives the generated or selected game outcome and provides the game outcome to the player. In an alternative embodiment, how the generated or selected game outcome is to be presented or displayed to the player, such as a reel symbol combination of a slot machine or a hand of cards dealt in a card game, is also determined by the central server or controller and communicated to the initiated gaming device to be presented or displayed to the player. Central production or control can assist a gaming establishment or other entity in maintaining appropriate records, controlling gaming, reducing and preventing cheating or electronic or other errors, reducing or eliminating win-loss volatility and the like.
In one embodiment, a plurality of the gaming devices are capable of being connected together through a data network. In one embodiment, the data network is a local area network (LAN), in which one or more of the gaming devices are substantially proximate to each other and an on-site central server or controller as in, for example, a gaming establishment or a portion of a gaming establishment. In another embodiment, the data network is a wide area network (WAN) in which one or more of the gaming devices are in communication with at least one off-site central server or controller. In this embodiment, the plurality of gaming devices may be located in a different part of the gaming establishment or within a different gaming establishment than the off-site central server or controller. Thus, the WAN may include an off-site central server or controller and an off-site gaming device located within gaming establishments in the same geographic area, such as a city or state. The WAN gaming system may be substantially identical to the LAN gaming system described above, although the number of gaming devices in each system may vary relative to each other.
In another embodiment, the data network is an internet or intranet. In this embodiment, the operation of the gaming device can be viewed at the gaming device with at least one internet browser. In this embodiment, operation of the gaming device and accumulation of credits may be accomplished with only a connection to the central server or controller (the internet/intranet server) through a conventional phone or other data transmission line, digital subscriber line (DSL), T-1 line, coaxial cable, fiber optic cable, or other suitable connection. In this embodiment, players may access an internet game page from any location where an internet connection and computer, or other internet facilitator is available. The expansion in the number of computers and number and speed of internet connections in recent years increases opportunities for players to play from an ever-increasing number of remote sites. It should be appreciated that 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 the player.
As mentioned above, in one embodiment, the present disclosure may be employed in a server based gaming system. In one such embodiment, as described above, one or more gaming devices are in communication with a central server or controller. The central server or controller may be any suitable server or computing device which includes at least one processor and a memory or storage device. In alternative embodiments, the central server is a progressive controller or another gaming machine in the gaming system. In one embodiment, the memory device of the central server stores different game programs and instructions, executable by a gaming device processor, to control the gaming device. Each executable game program represents a different game or type of game which may be played on one or more of the gaming devices in the gaming system. Such different games may include the same or substantially the same game play with different pay tables. In different embodiments, the executable game program is for a primary game, a secondary game or both. In another embodiment, the game program may be executable as a secondary game to be played simultaneous with the play of a primary game (which may be downloaded to or fixed on the gaming device) or vice versa.
In this embodiment, each gaming device at least includes one or more display devices and/or one or more input devices for interaction with a player. A local processor, such as the above-described gaming device processor or a processor of a local server, is operable with the display device(s) and/or the input device(s) of one or more of the gaming devices.
In operation, the central controller is operable to communicate one or more of the stored game programs to at least one local processor. In different embodiments, the stored game programs are communicated or delivered by embedding the communicated game program in a device or a component (e.g., a microchip to be inserted in a gaming device), writing the game program on a disc or other media, downloading or streaming the game program over a dedicated data network, Internet or a telephone line. After the stored game programs are communicated from the central server, the local processor executes the communicated program to facilitate play of the communicated program by a player through the display device(s) and/or input device(s) of the gaming device. That is, when a game program is communicated to a local processor, the local processor changes the game or type of game played at the gaming device.
As shown in FIG. 3 there is provided an embodiment of a gaming device according to the disclosure. This figure shows a front view of a display device 60 of this embodiment showing a plurality of symbols on one of a plurality of reels 62a to 62e. Each of the reels includes a plurality of symbols which are represented by letters, numbers or images. The symbols include a plurality of award symbols such as 64 and wild symbols such as 66. It should be appreciated that any suitable types of symbols may be employed in the gaming device.
Each symbol is positioned at a symbol position such as 68a, 68b and 68c of the central reel 62c. For each reel activation, the reels independently spin until each reel stops at a generated symbol position, that is a reel stop position. The display device 60 indicates a combination of symbols along one of a plurality of paylines such as 70a to 70y. In this example there are 25 paylines 70a to 70y each associated with a combination of five symbol positions from left to right.
A credit display 72 displays the number of credits available to the player to wager or bet on the game. A bet or wager display 74 indicates the number of credits the player wagered or bet on the game. A win display 76 indicates the total value of the awards accumulated by the player in the game. While the player's credit balance, the player's wager, and any awards are displayed as an amount of monetary credits or currency in certain of the embodiments described herein, one or more of such player's credit balance, such player's wager, and any awards provided to such a player may be for non-monetary credits, promotional credits, and/or player tracking points or credits.
As best shown in FIG. 4A the game begins with an initial game by activating the reels 62a to 62e to display the symbols at respective stop positions. For ease of understanding the display device 60 is limited to showing one only of the reels 62c although in this example it will be understood that there are five reels in a five times three matrix or grid. It should be appreciated that any suitable number or quantity of reels may be employed in the game. The centre reel 62c is associated with a first symbol position 68a which displays the wild symbol 66a, in this example the wild EYE. The centre reel 62c also displays the letter A at a second symbol position 68b and the letter K at the third symbol position 68c. It should be appreciated that the other reels such as 62a are associated with other symbol positions which display other symbols at generated reel stop positions.
As shown in FIG. 4B the wild symbol 66a displayed on the central reel 62c in the initial game extends to symbol position two 68b and symbol position three 68c previously displaying the letters A and K, respectively. In this embodiment the wild EYE symbol 66a duplicates in the symbol positions two and three at 68b and 68c. The game then determines if any winning symbols or symbol combinations have occurred on the plurality of reels such as 62a to 62e in an initial award evaluation in this initial game. For example in FIG. 3 the game awards payline one 70a on the occurrence of three eagle-type symbols where the wild EYE symbols duplicated on reels two and three in position two substitutes for the eagle-type symbol of reel one 62A in position two.
As shown in FIG. 5A in a subsequent game the central reel 62c spins to a stop position which displays the wild EYE symbol at symbol position three 68c. For clarity the display device 60 is again shown with the central reel 62c only. This wild EYE symbol 66c was duplicated from the EYE symbol 66a of the initial spin. The duplicated wild symbols 66b and 66c are thus retained on the central reel 62c in the subsequent game spin.
As shown in FIG. 5B the wild EYE symbol 66c in symbol position three 68c extends to the other symbol positions four and five 68d and 68e, respectively, previously occupied by the number 10 and the eagle-type symbol. In this subsequent game it is determined if any winning symbols or symbol combinations have occurred on the plurality of reels 62a to 62e in a subsequent award evaluation. During the award evaluation, the gaming device determines whether one or more winning combinations are displayed on the reel. The extension of the wild symbol generates more winning combinations for players of the gaming device. This gives players a better chance of obtaining an award while playing the gaming device.
In this embodiment the initial and subsequent games may be continued in a free game feature. As shown in FIGS. 4A/4B and 5A/5B the initial and subsequent games are games one and two of 10 free games. In this embodiment, the wild EYE symbol will each time it is displayed in the central reel 62c extend to the other displayed symbol positions such as 68d and 68e. The wild symbol 66 is therefore persistently extended along the determined reel such as 62c so that it progressively wraps around the reel 62c. Each of the extended or in this example duplicated wild symbols overlays or replaces one or more symbols on the determined reel and causes each replaced symbol to act as a wild symbol.
The wild symbol will in the various embodiments extend on the determined reel until one or more of the following events occur:

    
    
        1. The wild symbol does not display on the determined reel;
        2. The determined reel is fully occupied with the wild symbol and extended wild symbols;
        3. The feature free games are complete;
        4. A reset symbol reverts the determined reel to its previous designated symbols;
        5. If consecutive symbols are not displayed, the determined reels are reverted to their previous designated symbols;
        6. The extending wild symbols reset after a predetermined number or quantity of feature games; such as free games, if for example a predetermined award evaluation has occurred, for example the wild triples prizes or there is some other prize uplift.
    
    


In the examples described the wild symbol is extended to the visible area only of the display device such as 60. It is possible however that the wild symbol may be extended to symbol positions outside the visible symbol positions to enhance the number of possible winning hits.
It should be appreciated that the extension of wild symbols is not limited to feature games such as free spins. It may also apply to the base game as a series of consecutive occurrences. For example during the base game if a wild appears it will extend to cover all positions on that reel. All wins paid will be paid accordingly. The Wild will remain extended for the next base game spin and if it lands will extend again. Modification to the base game strips will continue as long as the wild appears on screen. Although not limited to feature games the extending wild symbol may apply to other feature games. For example, extending wild symbols could be used in re-spins where some reels are held while others are re-spun. As an alternative to free games a player may buy feature games where the bought feature games incorporate the extending wild symbols.
In the embodiment described and illustrated extension of the wild symbol is limited to reels two, three and four. It should be appreciated that extension of the wild symbol may be limited to one of the reels only or extend to all available reels. The extension to all available reels is not limited to five reels only but may apply to any reel layout or alternate arrangement of symbols on the screen display such as 60. For example, the gaming device may employ one or more uni-symbol display reels where each symbol on a display of the gaming device represents or is included on a different reel.
It is to be understood that wild symbols are equivalent to substitute symbols. If the wild symbol extends to cover additional positions on the determined reels. These positions remain substitutes for a subsequent game. In the case of free games, the extended wild symbols remain for the rest of the free games. The wild symbol is in this exampled designated with the EYE symbol but may be designated with any suitable designator or symbol. The probability of each of the symbols and in particular the wild symbol being indicated or generated on one of the reels 62a to 62e is suitably determined by the game implementor and may for example be determined based on a required return to player. The probability associated with the wild symbol displaying is less than at least one of the probabilities associated with the other symbols on the reels displaying.
The wild symbol matches or substitutes for any other symbol within the set of symbols used in the game. The wild symbol generally substitutes for one of the symbols indicated on the same payline as the wild symbol. The wild symbol may also match or substitute for the most desirable symbol on a payline such as a jackpot symbol or the symbol associated with the largest award in the game.
In the initial and subsequent award evaluation there are any number of awards associated with the symbols or combination of symbols. For example, the awards may be one or more of: one or more values, 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, one or more modifiers, such as one or more multipliers, a quantity of free plays of one or more games, a quantity of free spins of a plurality of reels (or one or more wheels), 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 of 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 the internet, and/or any other suitable award or awards. The determination of any winning symbol combinations and evaluation of awards will continue until the game reverts to regular play wherein typically the extended wild symbols revert to their original designated symbols.
The gaming device and methodology of the present disclosure also include a wild symbol that extends across a plurality of the reels. That is, the wild symbol extends from left to right or right to left and causes at least one symbol from a plurality of the reels to act as a wild symbol. That is, the display device 60 appears in the form of an expanding wild row rather than an expanding wild column as described earlier. The extending wild symbol may be employed by a game that is displayed by either or both of the display devices 16 and 18 described above.
It should be appreciated that in different embodiments, one or more of:

    
    
        i. a quantity of wild symbols associated with a play of a game;
        ii. a quantity of wild symbols generated when a game is initiated;
        ii. a quantity of wild symbols associated with one or more reels;
        iv. which wild symbols are generated in association with which reels;
        v. which symbol positions which wild symbols are generated at;
        vi. which symbol positions which non-wild symbols are generated at;
        vii. a direction one or more wild symbols extend;
        viii. a quantity of symbol positions one or more wild symbols extend to;
        ix. which symbol positions which wild symbols extend to;
        x. whether a wild symbol is replicated at another symbol position;
        xi. a quantity of reels one or more wild symbols extend to;
        xii. which reels one or more wild symbols extend to;
        xiii. a quantity of games played which one or more wild symbols persist;
        xiv. which event causes a termination of the extending wild symbol feature;
        xv. which symbols one or more wild symbols match or substitute for;
        xvi. which symbol combinations form winning symbol combinations;
        xvii. which awards are associated with which formed winning symbol combinations; and
        xviii. 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.

    
    


The present disclosure may be implemented in various configurations for gaming machines or gaming devices, including but not limited to: (1) a dedicated gaming machine or gaming device, wherein the computerized instructions for controlling any games (which are provided by the gaming machine or gaming device) are provided with the gaming machine or gaming device prior to delivery to a gaming establishment; and (2) a changeable gaming machine or gaming device, where the computerized instructions for controlling any games (which are provided by the gaming machine or gaming device) are downloadable to the gaming machine or gaming device through a data network when the gaming machine or gaming device is in a gaming establishment. In one embodiment, the computerized instructions for controlling any games are executed by a central server, central controller or remote host. In such a “thin client” embodiment, the central server remotely controls any games (or other suitable interfaces) and the gaming device is utilized to display such games (or suitable interfaces) and receive one or more inputs or commands from a player. In another embodiment, the computerized instructions for controlling any games are communicated from the central server, central controller or remote host to a gaming device local processor and memory devices. In such a “thick client” embodiment, the gaming device local processor executes the communicated computerized instructions to control any games (or other suitable interfaces) provided to a player.
In one embodiment, one or more gaming devices in a gaming system may be thin client gaming devices and one or more gaming devices in the gaming system may be thick client gaming devices. In another embodiment, certain functions of the gaming device are implemented in a thin client environment and certain other functions of the gaming device are implemented in a thick client environment. In one such embodiment, computerized instructions for controlling any primary games are communicated from the central server to the gaming device in a thick client configuration and computerized instructions for controlling any secondary games or bonus functions are executed by a central server in a thin client configuration.
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. For example, the device and method may extend to different wagering games such as video poker games, video blackjack games, video keno, video bingo or any other suitable game may be implemented. 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 which indicates a monetary value is received via the acceptor,
establish a credit balance based, at least in part, on the indicated monetary value of the received physical item;
(b) display a plurality of reels, each reel associated with a plurality of symbol positions,
(c) for an initial game of a plurality of games:
(i) display a plurality of symbols at the plurality of symbol positions associated with the reels,
(ii) when at least one wild symbol is displayed at at least one symbol position associated with at least one of the reels, for each displayed wild symbol, extend said displayed wild symbol to at least another one of the symbol positions,
(iii) determine any awards associated with the displayed symbols and any wild symbols displayed at any of the symbol positions associated with any of the reels, and
(iv) display any determined awards, said credit balance being increasable based on any displayed determined awards,

(d) for at least one subsequent game of the plurality of games:
(i) when any displayed wild symbols were extended to any other symbol positions associated with any of the reels in the initial game:
(A) determine whether to continue to display at least one of said displayed extended wild symbols, and
(B) when the determination is to continue to display at least one of said displayed extended wild symbols:
 (I) continue to display at least one of said displayed extended wild symbols at the same symbol positions associated with the reels as displayed in the initial game, and
 (II) extend at least one of said displayed extended wild symbols to at least another one of the symbol positions,


(ii) display a plurality of symbols at any remaining symbol positions associated with the reels,
(iii) determine any awards associated with the displayed symbols and any wild symbols displayed at any of the symbol positions associated with any of the reels, and
(iv) display any determined awards, said credit balance being increasable based on any displayed determined awards; and

(e) 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 when executed by the at least one processor, the plurality of instructions cause the at least one processor to, for the initial game, extend at least one of any displayed wild symbols to at least another one of the symbol positions associated with another one of the reels.

3. 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, for the at least one subsequent game, continue to extend at least one of any displayed wild symbols to at least another one of the symbol positions associated with another one of the reels.

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, for at least another subsequent game of the plurality of games:
(i) if any displayed wild symbols were extended to any other symbol positions associated with any of the reels in a previous game of the plurality of games:
(A) determine whether to continue to display at least one of said displayed wild symbols, and
(B) if the determination is to continue to display at least one of said displayed wild symbols, continue to extend at least one of said displayed wild symbols to at least another one of the symbol positions,

(ii) display a plurality of symbols at any remaining symbol positions associated with the reels,
(iii) determine any awards associated with the displayed symbols and any wild symbols displayed at any of the symbol positions associated with any of the reels, and
(iv) display any determined awards.

5. 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, for each displayed wild symbol, extend said wild symbol by replicating said wild symbol in the other one of the symbol positions.

6. The gaming system of claim 5, wherein, for the initial game, at least one of the symbol positions in which said wild symbol is replicated is adjacent the symbol position said wild symbol was displayed at.

7. The gaming system of claim 6, wherein, for the at least one subsequent game, at least one of the symbol positions in which said wild symbol is replicated is adjacent the symbol position said wild symbol was displayed at for the initial game.

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, for at least one of any displayed wild symbols, extend the displayed wild symbol by persistently extending the wild symbol in a series of the plurality of games.

9. The gaming system of claim 8, wherein when executed by the at least one processor, the plurality of instructions cause the at least one processor to display the persistently extended wild symbol to progressively wrap around one of the reels.

10. 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, for the initial game, extend any displayed wild symbols along all displayed symbol positions associated with the reel including the symbol position of the displayed wild symbol.

11. The gaming system of claim 10, wherein when executed by the at least one processor, the plurality of instructions cause the at least one processor to, for the at least one subsequent game, extend any displayed wild symbols along all displayed symbol positions associated with the reel including the symbol position of the displayed wild symbol from the initial game.

12. 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 reset the extended wild symbols following a predetermined quantity of the plurality of games.

13. A method of operating a gaming system, said method comprising:
(a) causing at least one display device to display a plurality of reels, each reel associated with a plurality of symbol positions,
(b) for an initial game of a plurality of games:
(i) causing the at least one display device to display a plurality of symbols at the plurality of symbol positions associated with the reels,
(ii) when at least one wild symbol is displayed at at least one symbol position associated with at least one of the reels, for each displayed wild symbol, causing at least one processor to execute a plurality of instructions to extend said displayed wild symbol to at least another one of the symbol positions,
(iii) causing the at least one processor to execute the plurality of instructions to determine any awards associated with the displayed symbols and any wild symbols displayed at any of the symbol positions associated with any of the reels,
(iv) causing the at least one display device to display any determined awards, and
(v) causing any displayed determined awards to increase a credit balance, said credit balance being:
(A) increasable via an acceptor of a physical item which indicates a monetary value, and
(B) decreasable via a cashout device configured to receive an input to cause an initiation of any payout associated with the credit balance, and


(c) for at least one subsequent game of the plurality of games:
(i) when any displayed wild symbols were extended to any other symbol positions associated with any of the reels in the initial game:
(A) causing the at least one processor to execute the plurality of instructions to determine whether to continue to display at least one of said displayed extended wild symbols, and
(B) when the determination is to continue to display at least one of said displayed extended wild symbols:
(I) causing the at least one display device to continue to display at least one of said displayed extended wild symbols at the same symbol positions associated with the reels as displayed in the initial game, and
(II) causing the at least one processor to execute the plurality of instructions to extend at least one of said displayed extended wild symbols to at least another one of the symbol positions,


(ii) causing the at least one display device to display a plurality of symbols at any remaining symbol positions associated with the reels,
(iii) causing the at least one processor to execute the plurality of instructions to determine any awards associated with the displayed symbols and any wild symbols displayed at any of the symbol positions associated with any of the reels,
(iv) causing the at least one display device to display any determined awards, and
(v) causing any displayed determined awards to increase the credit balance.

14. The method of claim 13, which includes, for the initial game, causing the at least one processor to execute the plurality of instructions to extend at least one of any displayed wild symbols to at least another one of the symbol positions associated with another one of the reels.

15. The method of claim 13, which includes, for the at least one subsequent game, causing the at least one processor to execute the plurality of instructions to continue to extend at least one of any displayed wild symbols to at least another one of the symbol positions associated with another one of the reels.

16. The method of claim 13, which includes, for at least another subsequent game of the plurality of games:
(i) if any displayed wild symbols were extended to any other symbol positions associated with any of the reels in a previous game of the plurality of games:
(A) causing the at least one processor to execute the plurality of instructions to determine whether to continue to display at least one of said displayed wild symbols, and
(B) if the determination is to continue to display at least one of said displayed wild symbols, causing the at least one processor to execute the plurality of instructions to continue to extend at least one of said displayed wild symbols to at least another one of the symbol positions,

(ii) causing the at least one display device to display a plurality of symbols at any remaining symbol positions associated with the reels,
(iii) causing the at least one processor to execute the plurality of instructions to determine any awards associated with the displayed symbols and any wild symbols displayed at any of the symbol positions associated with any of the reels, and
(iv) causing the at least one display device to display any determined awards.

17. The method of claim 13, which includes, for each displayed wild symbol, causing the at least one processor to execute the plurality of instructions to extend said wild symbol by replicating said wild symbol in the other one of the symbol positions.

18. The method of claim 17, wherein, for the initial game, at least one of the symbol positions in which said wild symbol is replicated is adjacent the symbol position said wild symbol was displayed at.

19. The method of claim 18, wherein, for the at least one subsequent game, at least one of the symbol positions in which said wild symbol is replicated is adjacent the symbol position said wild symbol was displayed at for the initial game.

20. The method of claim 13, which includes, for at least one of any displayed wild symbols, causing the at least one processor to execute the plurality of instructions to extend the displayed wild symbol by persistently extending the wild symbol in a series of the plurality of games.

21. The method of claim 20, which includes causing the at least one display device to display the persistently extended wild symbol to progressively wrap around one of the reels.

22. The method of claim 13, which includes, for the initial game, causing the at least one processor to execute the plurality of instructions to extend any displayed wild symbols along all displayed symbol positions associated with the reel including the symbol position of the displayed wild symbol.

23. The method of claim 22, which includes, for the at least one subsequent game, causing the at least one processor to execute the plurality of instructions to extend any displayed wild symbols along all displayed symbol positions associated with the reel including the symbol position of the displayed wild symbol from the initial game.

24. The method of claim 13, which includes causing the at least one processor to execute the plurality of instructions to reset the extended wild symbols following a predetermined quantity of the plurality of games.

25. The method of claim 13, which is provided through a data network.

26. The method of claim 25, wherein the data network is an internet.

27. 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 whether to continue to display at least one of said displayed extended wild symbols based on if, for the initial game, any awards are associated with the displayed symbols and any wild symbols displayed at any of the symbol positions associated with any of the reels.

28. The method of claim 13, which includes causing the at least one processor to execute the plurality of instructions to determine whether to continue to display at least one of said displayed extended wild symbols based on if, for the initial game, any awards are associated with the displayed symbols and any wild symbols displayed at any of the symbol positions associated with any of the reels.