Patent Publication Number: US-2023154285-A1

Title: Gaming machine and method with persistent award modifier triggered and modified by appearance of a catalyst symbol

Description:
COPYRIGHT 
     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 facsimile reproduction by anyone of the patent disclosure, as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever. Copyright 2021, SG Gaming, Inc. 
     FIELD OF THE INVENTION 
     The present invention relates to a technological improvement to gaming systems, gaming machines, and methods and, more particularly, to new and improved animations in connection with a symbol array persistence feature. 
     BACKGROUND OF THE INVENTION 
     The gaming industry depends upon player participation. Players are generally “hopeful” players who either think they are lucky or at least think they can get lucky—for a relatively small investment to play a game, they can get a disproportionately large return. To create this feeling of luck, a gaming apparatus relies upon an internal or external random element generator to generate one or more random elements such as random numbers. The gaming apparatus determines a game outcome based, at least in part, on the one or more random elements. 
     A significant technical challenge is to improve the operation of gaming apparatus and games played thereon, including the manner in which they leverage the underlying random element generator, by making them yield a negative return on investment in the long run (via a high quantity and/or frequency of player/apparatus interactions) and yet random and volatile enough to make players feel they can get lucky and win in the short run. Striking the right balance between yield versus randomness and volatility to create a feeling of luck involves addressing many technical problems, some of which can be at odds with one another. This luck factor is what appeals to core players and encourages prolonged and frequent player participation. As the industry matures, the creativity and ingenuity required to improve such operation of gaming apparatus and games grows accordingly. 
     Another significant technical challenge is to provide a new and improved level of game play that uses new and improved gaming apparatus animations. Improved animations represent improvements to the underlying technology or technical field of gaming apparatus and, at the same time, have the effect of encouraging prolonged and frequent player participation. 
     SUMMARY OF THE INVENTION 
     According to an embodiment of the present invention, there is provided a gaming system, gaming machine, and method that utilize an electronic display device configured to display a plurality of symbol-bearing reels and an indicator bearing a pay multiplier. For each spin outcome, the reels are spun and stopped to land symbols in an array. In response to the landed symbols including a catalyst symbol, the values on any value-bearing symbols in the array are multiplied by the pay multiplier and awarded, and the pay multiplier is then modified for a subsequent spin outcome(s) based on the type, e.g., color, of the catalyst symbol. In response to the landed symbols not including the catalyst symbol, no awards are provided for any value-bearing symbols in the array, and the pay multiplier stays the same for subsequent spin outcome(s) until a catalyst symbol lands in the array. Whether or not a catalyst symbol appears in the spin outcome, the pay multiplier multiplies other pays, e.g., standard pays, in the spin outcome. 
     Additional aspects of the invention will be apparent to those of ordinary skill in the art in view of the detailed description of various embodiments, which is made with reference to the drawings, a brief description of which is provided below. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view of a free-standing gaming machine according to an embodiment of the present invention. 
         FIG.  2    is a schematic view of a gaming system according to an embodiment of the present invention. 
         FIG.  3    is a flowchart for a data processing method that corresponds to instructions executed by a controller, according to an embodiment of the present invention. 
         FIGS.  4  through  11    depict an illustrative series of game images that illustrate aspects of the data processing method. 
     
    
    
     While the invention is susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and will be described in detail herein. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed. Rather, the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. 
     DETAILED DESCRIPTION 
     While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and will herein be described in detail preferred embodiments of the invention with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the broad aspect of the invention to the embodiments illustrated. For purposes of the present detailed description, the singular includes the plural and vice versa (unless specifically disclaimed); the words “and” and “or” shall be both conjunctive and disjunctive; the word “all” means “any and all”; the word “any” means “any and all”; and the word “including” means “including without limitation.” 
     For purposes of the present detailed description, the terms “wagering game,” “casino wagering game,” “gambling,” “slot game,” “casino game,” and the like include games in which a player places at risk a sum of money or other representation of value, whether or not redeemable for cash, on an event with an uncertain outcome, including without limitation those having some element of skill. In some embodiments, the wagering game involves wagers of real money, as found with typical land-based or online casino games. In other embodiments, the wagering game additionally, or alternatively, involves wagers of non-cash values, such as virtual currency, and therefore may be considered a social or casual game, such as would be typically available on a social networking web site, other web sites, across computer networks, or applications on mobile devices (e.g., phones, tablets, etc.). When provided in a social or casual game format, the wagering game may closely resemble a traditional casino game, or it may take another form that more closely resembles other types of social/casual games. 
     Referring to  FIG.  1   , there is shown a gaming machine  10  similar to those operated in gaming establishments, such as casinos. With regard to the present invention, the gaming machine  10  may be any type of gaming terminal or machine and may have varying structures and methods of operation. For example, in some aspects, the gaming machine  10  is an electromechanical gaming terminal configured to play mechanical slots, whereas in other aspects, the gaming machine is an electronic gaming terminal configured to play a video casino game, such as slots, keno, poker, blackjack, roulette, craps, etc. The gaming machine  10  may take any suitable form, such as floor-standing models as shown, handheld mobile units, bartop models, workstation-type console models, etc. Further, the gaming machine  10  may be primarily dedicated for use in playing wagering games, or may include non-dedicated devices, such as mobile phones, personal digital assistants, personal computers, etc. Exemplary types of gaming machines are disclosed in U.S. Pat. Nos. 6,517,433, 8,057,303, and 8,226,459, which are incorporated herein by reference in their entireties. 
     The gaming machine  10  illustrated in  FIG.  1    comprises a gaming cabinet  12  that securely houses various input devices, output devices, input/output devices, internal electronic/electromechanical components, and wiring. The cabinet  12  includes exterior walls, interior walls and shelves for mounting the internal components and managing the wiring, and one or more front doors that are locked and require a physical or electronic key to gain access to the interior compartment of the cabinet  12  behind the locked door. The cabinet  12  forms an alcove  14  configured to store one or more beverages or personal items of a player. A notification mechanism  16 , such as a candle or tower light, is mounted to the top of the cabinet  12 . It flashes to alert an attendant that change is needed, a hand pay is requested, or there is a potential problem with the gaming machine  10 . 
     The input devices, output devices, and input/output devices are disposed on, and securely coupled to, the cabinet  12 . By way of example, the output devices include a primary display  18 , a secondary display  20 , and one or more audio speakers  22 . The primary display  18  or the secondary display  20  may be a mechanical-reel display device, a video display device, or a combination thereof in which a transmissive video display is disposed in front of the mechanical-reel display to portray a video image superimposed upon the mechanical-reel display. The displays variously display information associated with wagering games, non-wagering games, community games, progressives, advertisements, services, premium entertainment, text messaging, emails, alerts, announcements, broadcast information, subscription information, etc. appropriate to the particular mode(s) of operation of the gaming machine  10 . The gaming machine  10  includes a touch screen(s)  24  mounted over the primary or secondary displays, buttons  26  on a button panel, a bill/ticket acceptor  28 , a card reader/writer  30 , a ticket dispenser  32 , and player-accessible ports (e.g., audio output jack for headphones, video headset jack, USB port, wireless transmitter/receiver, etc.). It should be understood that numerous other peripheral devices and other elements exist and are readily utilizable in any number of combinations to create various forms of a gaming machine in accord with the present concepts. 
     The player input devices, such as the touch screen  24 , buttons  26 , a mouse, a joystick, a gesture-sensing device, a voice-recognition device, and a virtual-input device, accept player inputs and transform the player inputs to electronic data signals indicative of the player inputs, which correspond to an enabled feature for such inputs at a time of activation (e.g., pressing a “Max Bet” button or soft key to indicate a player&#39;s desire to place a maximum wager to play the wagering game). The inputs, once transformed into electronic data signals, are output to game-logic circuitry for processing. The electronic data signals are selected from a group consisting essentially of an electrical current, an electrical voltage, an electrical charge, an optical signal, an optical element, a magnetic signal, and a magnetic element. 
     The gaming machine  10  includes one or more value input/payment devices and value output/payout devices. In order to deposit cash or credits onto the gaming machine  10 , the value input devices are configured to detect a physical item associated with a monetary value that establishes a credit balance on a credit meter such as the “credits” meter  200  (see  FIG.  4   ). The physical item may, for example, be currency bills, coins, tickets, vouchers, coupons, cards, and/or computer-readable storage mediums. The deposited cash or credits are used to fund wagers placed on the wagering game played via the gaming machine  10 . Examples of value input devices include, but are not limited to, a coin acceptor, the bill/ticket acceptor  28 , the card reader/writer  30 , a wireless communication interface for reading cash or credit data from a nearby mobile device, and a network interface for withdrawing cash or credits from a remote account via an electronic funds transfer. In response to a cashout input that initiates a payout from the credit balance on the “credits” meter  200  (see  FIG.  4   ), the value output devices are used to dispense cash or credits from the gaming machine  10 . The credits may be exchanged for cash at, for example, a cashier or redemption station. Examples of value output devices include, but are not limited to, a coin hopper for dispensing coins or tokens, a bill dispenser, the card reader/writer  30 , the ticket dispenser  32  for printing tickets redeemable for cash or credits, a wireless communication interface for transmitting cash or credit data to a nearby mobile device, and a network interface for depositing cash or credits to a remote account via an electronic funds transfer. 
     Turning now to  FIG.  2   , there is shown a block diagram of the gaming-machine architecture. The gaming machine  10  includes game-logic circuitry  40  securely housed within a locked box inside the gaming cabinet  12  (see  FIG.  1   ). The game-logic circuitry  40  includes a central processing unit (CPU)  42  connected to a main memory  44  that comprises one or more memory devices. The CPU  42  includes any suitable processor(s), such as those made by Intel and AMD. By way of example, the CPU  42  includes a plurality of microprocessors including a master processor, a slave processor, and a secondary or parallel processor. Game-logic circuitry  40 , as used herein, comprises any combination of hardware, software, or firmware disposed in or outside of the gaming machine  10  that is configured to communicate with or control the transfer of data between the gaming machine  10  and a bus, another computer, processor, device, service, or network. The game-logic circuitry  40 , and more specifically the CPU  42 , comprises one or more controllers or processors and such one or more controllers or processors need not be disposed proximal to one another and may be located in different devices or in different locations. The game-logic circuitry  40 , and more specifically the main memory  44 , comprises one or more memory devices which need not be disposed proximal to one another and may be located in different devices or in different locations. The game-logic circuitry  40  is operable to execute all of the various gaming methods and other processes disclosed herein. The main memory  44  includes a wagering-game unit  46 . In one embodiment, the wagering-game unit  46  causes wagering games to be presented, such as video poker, video blackjack, video slots, video lottery, etc., in whole or part. 
     The game-logic circuitry  40  is also connected to an input/output (I/O) bus  48 , which can include any suitable bus technologies, such as an AGTL+ frontside bus and a PCI backside bus. The I/O bus  48  is connected to various input devices  50 , output devices  52 , and input/output devices  54  such as those discussed above in connection with  FIG.  1   . The I/O bus  48  is also connected to a storage unit  56  and an external-system interface  58 , which is connected to external system(s)  60  (e.g., wagering-game networks). 
     The external system  60  includes, in various aspects, a gaming network, other gaming machines or terminals, a gaming server, a remote controller, communications hardware, or a variety of other interfaced systems or components, in any combination. In yet other aspects, the external system  60  comprises a player&#39;s portable electronic device (e.g., cellular phone, electronic wallet, etc.) and the external-system interface  58  is configured to facilitate wireless communication and data transfer between the portable electronic device and the gaming machine  10 , such as by a near-field communication path operating via magnetic-field induction or a frequency-hopping spread spectrum RF signals (e.g., Bluetooth, etc.). 
     The gaming machine  10  optionally communicates with the external system  60  such that the gaming machine  10  operates as a thin, thick, or intermediate client. The game-logic circuitry  40 —whether located within (“thick client”), external to (“thin client”), or distributed both within and external to (“intermediate client”) the gaming machine  10 —is utilized to provide a wagering game on the gaming machine  10 . In general, the main memory  44  stores programming for a random number generator (RNG), game-outcome logic, and game assets (e.g., art, sound, etc.)—all of which obtained regulatory approval from a gaming control board or commission and are verified by a trusted authentication program in the main memory  44  prior to game execution. The authentication program generates a live authentication code (e.g., digital signature or hash) from the memory contents and compare it to a trusted code stored in the main memory  44 . If the codes match, authentication is deemed a success and the game is permitted to execute. If, however, the codes do not match, authentication is deemed a failure that must be corrected prior to game execution. Without this predictable and repeatable authentication, the gaming machine  10 , external system  60 , or both are not allowed to perform or execute the RNG programming or game-outcome logic in a regulatory-approved manner and are therefore unacceptable for commercial use. In other words, through the use of the authentication program, the game-logic circuitry facilitates operation of the game in a way that a person making calculations or computations could not. 
     When a wagering-game instance is executed, the CPU  42  (comprising one or more processors or controllers) executes the RNG programming to generate one or more pseudo-random numbers. The pseudo-random numbers are divided into different ranges, and each range is associated with a respective game outcome. Accordingly, the pseudo-random numbers are utilized by the CPU  42  when executing the game-outcome logic to determine a resultant outcome for that instance of the wagering game. The resultant outcome is then presented to a player of the gaming machine  10  by accessing the associated game assets, required for the resultant outcome, from the main memory  44 . The CPU  42  causes the game assets to be presented to the player as outputs from the gaming machine  10  (e.g., audio and video presentations). Instead of a pseudo-RNG, the game outcome may be derived from random numbers generated by a physical RNG that measures some physical phenomenon that is expected to be random and then compensates for possible biases in the measurement process. Whether the RNG is a pseudo-RNG or physical RNG, the RNG uses a seeding process that relies upon an unpredictable factor (e.g., human interaction of turning a key) and cycles continuously in the background between games and during game play at a speed that cannot be timed by the player. Accordingly, the RNG cannot be carried out manually by a human and is integral to operating the game. 
     The gaming machine  10  may be used to play central determination games, such as electronic pull-tab and bingo games. In an electronic pull-tab game, the RNG is used to randomize the distribution of outcomes in a pool and/or to select which outcome is drawn from the pool of outcomes when the player requests to play the game. In an electronic bingo game, the RNG is used to randomly draw numbers that players match against numbers printed on their electronic bingo card. 
     The gaming machine  10  may include additional peripheral devices or more than one of each component shown in  FIG.  2   . Any component of the gaming-machine architecture includes hardware, firmware, or tangible machine-readable storage media including instructions for performing the operations described herein. Machine-readable storage media includes any mechanism that stores information and provides the information in a form readable by a machine (e.g., gaming terminal, computer, etc.). For example, machine-readable storage media includes read only memory (ROM), random access memory (RAM), magnetic-disk storage media, optical storage media, flash memory, etc. 
     In accord with various methods of conducting a wagering game on a gaming system in accord with the present concepts, the wagering game includes a game sequence in which a player makes a wager and a wagering-game outcome is provided or displayed in response to the wager being received or detected. The wagering-game outcome, for that particular wagering-game instance, is then revealed to the player in due course following initiation of the wagering game. The method comprises the acts of conducting the wagering game using a gaming apparatus, such as the gaming machine  10  depicted in  FIG.  1   , following receipt of an input from the player to initiate a wagering-game instance. The gaming machine  10  then communicates the wagering-game outcome to the player via one or more output devices (e.g., primary display  18  or secondary display  20 ) through the display of information such as, but not limited to, text, graphics, static images, moving images, etc., or any combination thereof. In accord with the method of conducting the wagering game, the game-logic circuitry  40  transforms a physical player input, such as a player&#39;s pressing of a “Spin” touch key or button, into an electronic data signal indicative of an instruction relating to the wagering game (e.g., an electronic data signal bearing data on a wager amount). 
     In the aforementioned method, for each data signal, the game-logic circuitry  40  is configured to process the electronic data signal, to interpret the data signal (e.g., data signals corresponding to a wager input), and to cause further actions associated with the interpretation of the signal in accord with stored instructions relating to such further actions executed by the controller. As one example, the CPU  42  causes the recording of a digital representation of the wager in one or more storage media (e.g., storage unit  56 ), the CPU  42 , in accord with associated stored instructions, causes the changing of a state of the storage media from a first state to a second state. This change in state is, for example, effected by changing a magnetization pattern on a magnetically coated surface of a magnetic storage media or changing a magnetic state of a ferromagnetic surface of a magneto-optical disc storage media, a change in state of transistors or capacitors in a volatile or a non-volatile semiconductor memory (e.g., DRAM, etc.). The noted second state of the data storage media comprises storage in the storage media of data representing the electronic data signal from the CPU  42  (e.g., the wager in the present example). As another example, the CPU  42  further, in accord with the execution of the stored instructions relating to the wagering game, causes the primary display  18 , other display device, or other output device (e.g., speakers, lights, communication device, etc.) to change from a first state to at least a second state, wherein the second state of the primary display comprises a visual representation of the physical player input (e.g., an acknowledgement to a player), information relating to the physical player input (e.g., an indication of the wager amount), a game sequence, an outcome of the game sequence, or any combination thereof, wherein the game sequence in accord with the present concepts comprises acts described herein. The aforementioned executing of the stored instructions relating to the wagering game is further conducted in accord with a random outcome (e.g., determined by the RNG) that is used by the game-logic circuitry  40  to determine the outcome of the wagering-game instance. In at least some aspects, the game-logic circuitry  40  is configured to determine an outcome of the wagering-game instance at least partially in response to the random parameter. 
     In one embodiment, the gaming machine  10  and, additionally or alternatively, the external system  60  (e.g., a gaming server), means gaming equipment that meets the hardware and software requirements for fairness, security, and predictability as established by at least one state&#39;s gaming control board or commission. Prior to commercial deployment, the gaming machine  10 , the external system  60 , or both and the casino wagering game played thereon may need to satisfy minimum technical standards and require regulatory approval from a gaming control board or commission (e.g., the Nevada Gaming Commission, Alderney Gambling Control Commission, National Indian Gaming Commission, etc.) charged with regulating casino and other types of gaming in a defined geographical area, such as a state. By way of non-limiting example, a gaming machine in Nevada means a device as set forth in NRS 463.0155, 463.0191, and all other relevant provisions of the Nevada Gaming Control Act, and the gaming machine cannot be deployed for play in Nevada unless it meets the minimum standards set forth in, for example, Technical Standards 1 and 2 and Regulations 5 and 14 issued pursuant to the Nevada Gaming Control Act. Additionally, the gaming machine and the casino wagering game must be approved by the commission pursuant to various provisions in Regulation 14. Comparable statutes, regulations, and technical standards exist in other gaming jurisdictions. As can be seen from the description herein, the gaming machine  10  may be implemented with hardware and software architectures, circuitry, and other special features that differentiate it from general-purpose computers (e.g., desktop PCs, laptops, and tablets). 
     Referring now to  FIG.  3   , there is shown a flowchart representing one data processing method corresponding to at least some instructions stored and executed by the game-logic circuitry  40  in  FIG.  2    to perform operations according to an embodiment of the present invention. 
     The data processing method commences at step  100 . At step  102 , the game-logic circuitry directs an electronic display device (e.g., video display) of the gaming machine to display a plurality of symbol-bearing reels and an array of symbol positions. The array of symbol positions comprises a plurality of rows and columns. The rows of the array are oriented in a horizontal direction, and the columns of the array are oriented in a generally vertical direction. Alternatively, the “rows” of the array may be oriented in a vertical direction, and the “columns” of the array may be oriented in a horizontal direction. The symbol positions in each row of the array are horizontally aligned with each other, and the symbol positions in each column of the array are vertically aligned with each other. The reels may be associated with the respective columns of the array such that the reels spin vertically and each reel populates a respective column. The reel spin is animated by depicting symbol-bearing strips moving vertically across the display and synchronously updating the symbols visible on each strip as the strip moves across the display. In another embodiment, the reels may be associated with the respective rows of the array such that the reels spin horizontally and each reel populates a respective row. In yet another embodiment, the reels may be associated with respective individual symbol positions of the array such that each reel populates only its respective symbol position. In the example shown in  FIG.  4   , the electronic display device displays five symbol-bearing reels  212 ,  214 ,  216 ,  218 ,  220  arranged from left to right and associated with respective columns of a 3×5 array  210  that includes three rows and five columns. 
     At step  104 , the game-logic circuitry detects, via at least one of one or more electronic input devices, a physical item associated with a monetary value that establishes a credit balance. As shown in  FIG.  4   , the credit balance may be shown on a credit meter  200  of the gaming machine. 
     At step  106 , the game-logic circuitry initiates a wagering game cycle in response to an input indicative of a wager covered by the credit balance. To initiate a spin of the reels, the player may press a “Spin” or “Max Bet” key on a button panel or touch screen. As shown in  FIG.  4   , the wagered amount may be shown on a bet meter  202  of the gaming machine. 
     At step  108 , using an RNG, the game-logic circuitry spins and stops the plurality of symbol-bearing reels to randomly land symbols from the reels in the array in visual association with one or more paylines (also known as lines, ways, patterns, or arrangements). The game-logic circuitry is configured to evaluate the displayed array of symbols and provides immediate awards and bonus games in accordance with a pay table. The pay table may, for example, include “line pays” and “scatter pays.” Line pays occur when a predetermined type and number of symbols appear along an activated payline, typically in a particular order such as left to right, right to left, top to bottom, bottom to top, etc. Scatter pays occur when a predetermined type and number of symbols appear anywhere in the displayed array without regard to position or paylines. Similarly, the wagering game may trigger bonus games based on one or more bonus triggering symbols appearing along an activated payline (i.e., “line trigger”) or anywhere in the displayed array (i.e., “scatter trigger”). The wagering game may also provide mystery awards and features independent of the symbols appearing in the displayed array. Each payline preferably consists of a single symbol position in each column of the array. The number of paylines may be as few as one or as many as possible given each payline consists of a single symbol position in each column of the array. In a 3×5 array with three rows and five columns, the maximum number of such paylines is 3 5 =243 lines.  FIG.  4    illustrates the reels  212 ,  214 ,  216 ,  218 ,  220  after they have been spun and stopped to randomly populate the array  210  with symbols from the reels. 
     At step  110 , the game-logic circuitry awards payouts for any standard pays (e.g., line pays and scatter pays) as determined by the game&#39;s pay table. The payouts are multiplied by a spin or pay multiplier (e.g., a multiplier 1× in indicator  206  in  FIG.  4   ). As described below in connection with  FIGS.  4 - 11   , the value of the pay multiplier is determined by the color of a most recent COIN symbol to land in the array in a prior spin of the reels. As shown in  FIG.  4   , the awarded payouts are added to a win meter  204  of the gaming machine. 
     At step  112 , the game-logic circuitry determines whether or not a colored COIN symbol landed in the array. In one embodiment, color COIN symbols only exist on the fifth or rightmost reel  220  (see  FIG.  4   ). If a colored COIN symbol landed in the array at step  112  (e.g., the red COIN symbol  222   a  in  FIG.  4   ), the game-logic circuitry proceeds to steps  114  and  116 . At step  114 , the game-logic circuitry awards the values borne by any value-bearing symbols (e.g., the three ENVELOPE symbols bearing the credit values  300 ,  800 , and  450  in  FIG.  4   ) multiplied by the pay multiplier (e.g., multiplier 1× in indicator  206  in  FIG.  4   ). The awarded values are added to the win meter  204  shown in  FIG.  4   . At step  116 , the game-logic circuitry modifies the pay multiplier in indicator  206  for the next spin(s) based on the color of the COIN symbol that landed in the array at step  112 . The value of the pay multiplier persists (i.e., remains unchanged) until a later spin yields another COIN symbol in the array. In one embodiment, red COIN symbols are associated with an 18× multiplier, blue COIN symbols are associated with an 8× multiplier, and green COIN symbols are associated with a 1× multiplier. Thus, if the landed COIN symbol is red as shown in  FIG.  4   , the next spin(s) will multiply all resulting pays by 18× until another COIN symbol lands in the array and, once again, changes the multiplier to a value associated with that COIN symbol. 
     If a colored COIN symbol did not land in the array at step  112 , the game-logic circuitry skips steps  114  and  116  and proceeds directly to step  118 . At step  118 , the game-logic circuitry determines whether or not it has received a cashout input via at least one of the one or more player input devices of the gaming machine. If it has not received a cashout input, the game-logic circuitry waits for the next wager input at step  106 . If it has received a cashout input, the game-logic circuitry initiates a payout from the credit balance on the credit meter such as the meter  200  in  FIG.  4   . The data processing method then ends at step  120 . 
     In accordance with the data processing method in  FIG.  3   ,  FIGS.  4  through  11    depict an illustrative series of eight game images associated with a series of eight game cycles. The game images illustrate aspects of the data processing method. Each game image is associated with a different game cycle and represents a wagered spin outcome, i.e., in response to a wager, the reels  212 ,  214 ,  216 ,  218 ,  220  have been spun and stopped to populate the array  210  with symbols. In the game images, the standard symbols are GRAPE, APPLE, CHERRY, BANANA, WATERMELON, EGGPLANT, and SEVEN; the value-bearing symbols are ENVELOPE (which looks like a rectangle); and a colored COIN symbol landing in the array serves as a catalyst for awarding the ENVELOPE values and changing a pay multiplier in indicator  206  for the next spin(s) based on the color of the COIN symbol. In this illustrated series of game cycles, standard pays occur when three or more matching standard symbols appear on adjacent reels along an active payline starting from the leftmost reel  212 . 
       FIG.  4    depicts a first spin outcome including a standard pay of four GRAPE symbols (assuming the GRAPE symbols are along an active payline); three ENVELOPE symbols bearing values of 300, 800, and 450 credits; and a red COIN symbol  222   a . The pay multiplier in indicator  206  is currently 1× and was generated in a prior spin outcome (not shown) by a green COIN symbol. The red COIN symbol  222   a  serves as a catalyst for awarding the three ENVELOPE values. If the standard pay for four GRAPE symbols is, for example, 50 credits, then the first spin outcome in  FIG.  4    yields a total payout of 1600 credits: the sum of 50 credits (for the four GRAPE symbols) multiplied by 1× (for the pay multiplier), and 1550 credits (for the three ENVELOPE symbols) multiplied by 1×. After this total payout is awarded, the pay multiplier in indicator  206  changes to 18× for the next spin outcome in  FIG.  5    because, as described above, the red COIN symbol  222   a  is associated with a pay multiplier of 18×. The pay multiplier will remain at 18×until a future spin outcome includes another COIN symbol. 
       FIG.  5    depicts a second spin outcome including a standard pay of three EGGPLANT symbols (assuming the EGGPLANT symbols are along an active payline); two ENVELOPE symbols bearing values of 200 and 500 credits; and no COIN symbols. The pay multiplier in indicator  206  is now 18× and was generated in the first spin outcome in  FIG.  4    by the red COIN symbol  222   a . If the standard pay for three EGGPLANT symbols is, for example, 30 credits, then the second spin outcome in  FIG.  5    yields a total payout of 540 credits: 30 credits (for the three EGGPLANT symbols) multiplied by 18×. Because no COIN symbols landed in the array, the game does not award the values on the two ENVELOPE symbols and keeps the pay multiplier in indicator  206  at 18× for the next spin outcome in  FIG.  6   . 
       FIG.  6    depicts a third spin outcome including no standard pays; two ENVELOPE symbols bearing values of 250 and 650 credits; and a blue COIN symbol  222   b . The pay multiplier in indicator  206  is still 18× because the prior spin outcome in  FIG.  5    did not include a multiplier-changing COIN symbol. The blue COIN symbol  222   b  serves as a catalyst for awarding the two ENVELOPE values. The third spin outcome in  FIG.  6    yields a total payout of 16200 credits: 900 credits (for the two ENVELOPE symbols) multiplied by 18×. After this total payout is awarded, the pay multiplier in indicator  206  changes to 8× for the next spin outcome in  FIG.  7    because, as described above, the blue COIN symbol  222   b  is associated with a pay multiplier of 8×. The pay multiplier will remain at 8× until a future spin outcome includes another COIN symbol. 
       FIG.  7    depicts a fourth spin outcome including no standard pays; one ENVELOPE symbol bearing a value of 700 credits; and no COIN symbols. The pay multiplier in indicator  206  is now 8× and was generated in the third spin outcome in  FIG.  6    by the blue COIN symbol  222   b . The fourth spin outcome yields no payouts. Because no COIN symbols landed in the array, the game does not award the value on the one ENVELOPE symbol and keeps the pay multiplier in indicator  206  at 8× for the next spin outcome in  FIG.  8   . 
       FIG.  8    depicts a fifth spin outcome including a standard pay of three APPLE symbols (assuming the APPLE symbols are along an active payline); two ENVELOPE symbols bearing values of 500 and 350 credits; and a blue COIN symbol  222   b . The pay multiplier in indicator  206  is still 8× because the prior spin outcome in  FIG.  7    did not include a multiplier-changing COIN symbol. The blue COIN symbol  222   b  serves as a catalyst for awarding the two ENVELOPE values. If the standard pay for three APPLE symbols is, for example, 30 credits, then the fifth spin outcome in  FIG.  8    yields a total payout of 7040 credits: the sum of 30 credits (for the three APPLE symbols) multiplied by 8× (for the pay multiplier), and 850 credits (for the two ENVELOPE symbols) multiplied by 8×. After this total payout is awarded, the pay multiplier in indicator  206  stays at 8× (or, technically, changes from 8× to 8×) for the next spin outcome in  FIG.  9    because the blue COIN symbol  222   b  is associated with a pay multiplier of 8×. The pay multiplier will remain at 8× until a future spin outcome includes another COIN symbol. 
       FIG.  9    depicts a sixth spin outcome including no standard pays; two ENVELOPE symbols bearing values of 750 and 400 credits; and a green COIN symbol  222   c . The pay multiplier in indicator  206  is now 8× and was generated in the fifth spin outcome in  FIG.  8    by the blue COIN symbol  222   b . The green COIN symbol  222   c  serves as a catalyst for awarding the two ENVELOPE values. The sixth spin outcome in  FIG.  9    yields a total payout of 9200 credits: 1150 credits (for the two ENVELOPE symbols) multiplied by 8×. After this total payout is awarded, the pay multiplier in indicator  206  changes to 1× for the next spin outcome in  FIG.  10    because, as described above, the green COIN symbol  222   c  is associated with the pay multiplier of 1×. The pay multiplier will remain at 1× until a future spin outcome includes another COIN symbol. 
       FIG.  10    depicts a seventh spin outcome including no standard pays; one ENVELOPE symbol bearing a value of 250 credits; and no COIN symbols. The pay multiplier in indicator  206  is now 1× and was generated in the sixth spin outcome in  FIG.  9    by the green COIN symbol  222   c . The seventh spin outcome yields no payouts. Because no COIN symbols landed in the array, the game does not award the value on the one ENVELOPE symbol and keeps the pay multiplier in indicator  206  at 1× for the next spin outcome in  FIG.  11   . 
       FIG.  11    depicts an eighth spin outcome including no standard pays; two ENVELOPE symbols bearing values of 750 and 900 credits; and a blue COIN symbol  222   b . The pay multiplier in indicator  206  is still 1× because the prior spin outcome in  FIG.  10    did not include a multiplier-changing COIN symbol. The blue COIN symbol  222   b  serves as a catalyst for awarding the two ENVELOPE values. The eighth spin outcome in  FIG.  11    yields a total payout of 1650 credits (for the two ENVELOPE symbols) multiplied by 1×. After this total payout is awarded, the pay multiplier in indicator  206  changes to 8× for the next spin outcome (not shown) because the blue COIN symbol  222   b  is associated with a pay multiplier of 8×. The pay multiplier will remain at 8× until a future spin outcome includes another COIN symbol. 
     The features described above in connection with wagered spin outcomes of the base game may also be used in connection with a bonus game including a series of free spins. In this regard, the bonus game may be constructed to guarantee that a colored COIN symbol will land in the array in each free spin outcome. And the pay multipliers associated with the different COIN symbol colors may be increased in the bonus game such that the minimum pay multiplier is, for example, 2× (instead of the 1× pay multiplier associated with the green COIN symbol in the base game). 
     To communicate which game elements contribute to payouts and how they contribute, the game-logic circuitry may direct the electronic display device to animate paying symbols, symbol positions, award amounts, application of the pay multiplier, and any modifications to the pay multiplier. The animation may, for example, include applying a border, pattern, color change, background change, watermark, or other distinguishing characteristic to the paying symbols and/or their symbol positions. To indicate that a landed COIN symbol causes the values of any ENVELOPE symbols to be awarded, animation may be used to create an apparent connection or link between the COIN symbol and each of the ENVELOPE symbols. For example, the COIN symbol and each of the ENVELOPE symbols may remain at their respective locations while an animation like lightning or other special effect extends between the COIN symbol and each of the ENVELOPE symbols. Alternatively, the COIN symbol may move or “float” from its landing position to each of the ENVELOPE symbols. Or, each of the ENVELOPE symbols may move or “float” from their respective landing positions to the COIN symbol. To indicate that a payout is multiplied by the pay multiplier in indicator  206 , animation may be used to create an apparent connection or link between the pay multiplier and the payout. For example, the pay multiplier and the payout may remain at their respective locations while an animation like lightning or other special effect extends between the pay multiplier and the payout. Alternatively, the pay multiplier may move or “float” from indicator  206  to each payout amount shown elsewhere on the display device. When the floating multiplier reaches a payout amount, the payout amount is increased by the multiplier. Or, each payout amount may move or “float” to indicator  206  and be increased when it reaches indicator  206 . To indicate that a landed COIN symbol modifies the pay multiplier in indicator  206  for the next spin(s), animation may be used at the conclusion of the current spin to create an apparent connection or link between the COIN symbol and indicator  206 . For example, the COIN symbol and indicator  206  may remain at their respective locations while an animation like lightning or other special effect extends between the COIN symbol and indicator  206 . Alternatively, the COIN symbol may move or “float” from its landing position to indicator  206 . When the floating COIN symbol reaches indicator  206 , the pay multiplier is changed to a value associated with the color of the COIN symbol. 
     As stated above, the green COIN symbol, the blue COIN symbol, and the red COIN symbol are associated with respective pay multipliers 1×, 8×, and 18×. In an alternative embodiment, each colored COIN symbol may be associated with a respective range of multipliers wherein a multiplier is randomly selected from the associated range. For example, the green COIN symbol may be associated with a low range (e.g., 1×-5×), the blue COIN symbol may be associated with a medium range (e.g., 6×-10×), and the red COIN may be associated with a high range (e.g., 11×-20×). In another embodiment, there is only one type of COIN symbol and, when the COIN symbol lands in the array, the game randomly selects a pay multiplier that persists through future spins until the COIN symbol re-appears in the array. 
     Instead of, or in addition to, using colors to represent different pay multipliers associated with the respective colored COIN symbols, each COIN symbol may bear its associated multiplier on its face or have a different shape, size, or other characteristic to represent different multipliers. 
     In the illustrated embodiment, COIN symbols only exist on the fifth reel and must land in the array in order to trigger the award of ENVELOPE values and a change in the pay multiplier to a value associated with the landed COIN symbol. In an alternative embodiment, COIN symbols may exist on one or more other reels and may likewise trigger these operations by landing in the array. If multiple COIN symbols land in the array, each COIN symbol may trigger the award of ENVELOPE values such that each ENVELOPE value is awarded multiple times. And if each COIN symbol is associated with a respective pay multiplier, the pay multiplier for the next spin may be changed to the sum or product of the pay multipliers associated with the multiple COIN symbols. 
     The COIN symbols may be associated with other modifiers besides, or in addition to, pay multipliers, including for example different credit amounts; different numbers of WILD symbols that are randomly distributed in the array after the reels have stopped; different numbers of WILD symbols (i.e., symbols that act as substitutes for standard symbols) that are added to the reel strips of the reels prior to stopping the reels; different numbers of free games/spins that do not require an additional wager; and so on. 
     In one embodiment, the symbol that triggers the award of ENVELOPE values may be different from the symbol that triggers a change in the pay multiplier for subsequent spins. For example, an OPEN ENVELOPE symbol may trigger the award of ENVELOPE values, while the green/blue/red COIN symbols trigger a change in the pay multiplier for subsequent spins without also awarding the ENVELOPE values. 
     Each of these embodiments and obvious variations thereof is contemplated as falling within the spirit and scope of the claimed invention, which is set forth in the following claims. Moreover, the present concepts expressly include any and all combinations and subcombinations of the preceding elements and aspects.