AU2013219162A1 - A method of gaming, a gaming system and a game controller - Google Patents

Abstract

A method of gaming in a gaming system, the method comprising selecting symbols for display at a plurality of 5 subsets of symbol display positions by independently determining stopping positions of reels of symbols associated with the subsets of display positions, wherein at least one subset of symbol display positions is associated with two or more reels and upon two or more 10 symbols being selected for the same symbol display position at least one symbol combination rule is applied to the two or more symbols to determine a resultant symbol for display and evaluating the displayed symbols to determine whether to make an award. 46139161 (GHMatters) P84492.AU.2 20/08/13 CN(N CO (0 0 (0 0 Cw 0 (o )) "0 a z S E -0 C C) _7 0( (0 (N c C)I 101g LI]O L

Description

Title A METHOD OF GAMING, A GAMING SYSTEM AND A GAME CONTROLLER 5 Related Application This application is a divisional application of Australian application no. 2012200953, the disclosure of which is incorporated herein by reference. 10 Field The invention relates to a method of gaming, a gaming system and a game controller. 15 Background Many gaming machines are reel based ("slot") machines where a plurality of reels are spun to a stop with a set 20 of symbols displayed to the player. The displayed symbols are then evaluated by the gaming machine based on the player's wager to determine whether they include any winning symbol combinations. 25 While such gaming systems provide players with enjoyment, a need exists for alternative gaming systems in order to maintain or increase player enjoyment. Summary 30 In a first aspect, the invention provides a method of gaming in a gaming system, the method comprising: selecting symbols for display at a plurality of subsets of symbol display positions by independently 35 determining stopping positions of reels of symbols associated with the subsets of display positions, wherein at least one subset of symbol display positions is 46139161 (GHMatters) P84492.AU.2 20/08/13 - 2 associated with two or more reels and upon two or more symbols being selected for the same symbol display position at least one symbol combination rule is applied to the two or more symbols to determine a resultant symbol 5 for display; and evaluating the displayed symbols to determine whether to make an award. In an embodiment, one of the two or more reels is a base 10 reel comprising symbols at each of a plurality of symbol positions of the reel. In an embodiment, another of the two or more reels is a modifier reel comprising symbols at a subset of a 15 plurality of symbol positions of the reel. In an embodiment, each reel comprises a symbol at each of the plurality of symbol positions of the reel. 20 In an embodiment, each subset of display positions is a column of display positions. In an embodiment, a symbol combination rule is that the symbols are combined such that each resultant symbol is a 25 composite symbol formed from the combined symbols. In an embodiment, the method comprises evaluating the displayed symbols comprises comparing the displayed symbols to a prize table containing at least one entry 30 corresponding to a possible composite symbol. In an embodiment, a symbol combination rule that applies to at least one symbol is that the at least one symbol overrides any other symbol such the at least one symbol is 35 displayed unmodified. In an embodiment, the evaluation is based on a wager which 46139161 (GHMatters) P84492.AU.2 20/08/13 - 3 applies to evaluation of the symbols. In a second aspect, the invention provides a gaming system comprising: 5 a display for displaying symbols at a plurality of subsets of symbol display positions; a memory storing a plurality of reels of symbols associated with the subsets of display positions, at least one subset of display positions being associated with two 10 or more reels; a symbol selector arranged to select symbols for display at the plurality of subsets of symbol display positions by independently determining stopping positions of reels of symbols associated with the subsets of display 15 positions, wherein at least one subset of symbol display positions is associated with two or more reels and upon two or more symbols being selected for the same symbol display position at least one symbol combination rule is applied to the two or more symbols by the game controller 20 to determine a resultant symbol for display; and a symbol evaluator arranged to evaluate the displayed symbols to determine whether to make an award. In an embodiment, one of the two or more reels is a base 25 reel comprising symbols at each of a plurality of symbol positions of the reel. In an embodiment, another of the two or more reels is a modifier reel comprising symbols at a subset of a 30 plurality of symbol positions of the reel. In an embodiment, each reel comprises a symbol at each of the plurality of symbol positions of the reel. 35 In an embodiment, each subset of display positions is a column of display positions. 46139161 (GHMatters) P84492.AU.2 20/08/13 - 4 In an embodiment, a symbol combination rule is that the symbols are combined such that each resultant symbol is a composite symbol formed from the combined symbols. 5 In an embodiment, the symbol evaluator evaluates the displayed symbols by comparing the displayed symbols to a prize table containing at least one entry corresponding to a possible composite symbol. 10 In an embodiment, a symbol combination rule that applies to at least one symbol is that the at least one symbol overrides any other symbol such the at least one symbol is displayed unmodified. 15 In an embodiment, the evaluation is based on a wager which applies to evaluation of the symbols. In a third aspect, the invention provides a game controller for a gaming system, the game controller 20 arranged to: select symbols for display at a plurality of subsets of symbol display positions by independently determining stopping positions of reels of symbols associated with the subsets of display positions, wherein at least one subset 25 of symbol display positions is associated with two or more reels and upon two or more symbols being selected for the same symbol display position at least one symbol combination rule is applied to the two or more symbols by the game controller to determine a resultant symbol for 30 display; and evaluate the displayed symbols to determine whether to make an award. In an embodiment, one of the two or more reels is a base 35 reel comprising symbols at each of a plurality of symbol positions of the reel. 46139161 (GHMatters) P84492.AU.2 20/08/13 - 5 In an embodiment, another of the two or more reels is a modifier reel comprising symbols at a subset of a plurality of symbol positions of the reel. 5 In an embodiment, each reel comprises a symbol at each of the plurality of symbol positions of the reel. In an embodiment, each subset of display positions is a column of display positions. 10 In an embodiment, a symbol combination rule is that the symbols are combined such that each resultant symbol is a composite symbol formed from the combined symbols. 15 In an embodiment, the game controller is arranged to evaluate the displayed symbols by comparing the displayed symbols to a prize table containing at least one entry corresponding to a possible composite symbol. 20 In an embodiment, a symbol combination rule that applies to at least one symbol is that the at least one symbol overrides any other symbol such the at least one symbol is displayed unmodified. 25 In an embodiment, the evaluation is based on a wager which applies to evaluation of the symbols. In a fourth aspect, the invention provides a gaming system comprising: 30 a display means for displaying symbols at a plurality of subsets of symbol display positions; a plurality of reels of symbols associated with the subsets of display positions, at least one subset of display positions being associated with two or more reels; 35 means for selecting symbols for display at a plurality of subsets of symbol display positions by independently determining stopping positions of reels of 46139161 (GHMatters) P84492.AU.2 20/08/13 - 6 symbols associated with the subsets of display positions, at least one subset of display positions being associated with two or more reels such that the means for selecting symbols (a) selects stopping positions for the two or more 5 reels, and, upon two or more symbols being selected for a symbol display position, (b) applies at least one symbol combination rule to the two or more symbols to determine a resultant symbol for display; and means for evaluating the displayed symbols to 10 determine whether to make an award. In a fifth aspect, the invention provides computer program code which when executed implements the above method. 15 In a sixth aspect, the invention provides a tangible computer readable medium comprising the above program code. Brief Description of Drawings 20 An exemplary embodiment of the invention will now be described with reference to the accompanying drawings in which: 25 Figure 1 is a block diagram of the core components of a gaming system; Figure 2 is a perspective view of a stand alone gaming machine; 30 Figure 3 is a block diagram of the functional components of a gaming machine; Figure 4 is a schematic diagram of the functional 35 components of a memory; Figure 5 is a schematic diagram of a network gaming 46139161 (GHMatters) P84492.AU.2 20/08/13 -7 system; Figure 6 is a further block diagram of a gaming system; 5 Figure 7 is a flow chart of an embodiment; Figures 8a and 8b illustrate how symbols from two reels may be combined at a single symbol display position; and 10 Figure 9 is an example of a game outcome. Detailed Description Referring to the drawings, there is shown a gaming system 15 having a game controller arranged to implement a spinning reel game where symbols are selected for a plurality of subsets of symbol display positions. Two or more reels correspond to at least one of the subsets of display positions and symbols are selected for the display 20 positions to which they correspond by independently selecting stopping positions for each reel to determine which symbols of the reels correspond to the subset of display positions. In some embodiments each reel has symbols at each symbol position of the reel and those 25 symbols are combined to form a resultant symbol which will be used in evaluation of the selected symbols of the reel. In some embodiments one reel only has symbols at some of the positions and symbols are combined upon two or more symbols being selected for a display position. 30 General construction of gaming system The gaming system can take a number of different forms. In a first form, a stand alone gaming machine is provided 35 wherein all or most components required for implementing the game are present in a player operable gaming machine. 46139161 (GHMatters) P84492.AU.2 20/08/13 - 8 In a second form, a distributed architecture is provided wherein some of the components required for implementing the game are present in a player operable gaming machine and some of the components required for implementing the 5 game are located remotely relative to the gaming machine. For example, a "thick client" architecture may be used wherein part of the game is executed on a player operable gaming machine and part of the game is executed remotely, such as by a gaming server; or a "thin client" 10 architecture may be used wherein most of the game is executed remotely such as by a gaming server and a player operable gaming machine is used only to display audible and/or visible gaming information to the player and receive gaming inputs from the player. 15 However, it will be understood that other arrangements are envisaged. For example, an architecture may be provided wherein a gaming machine is networked to a gaming server and the respective functions of the gaming machine and the 20 gaming server are selectively modifiable. For example, the gaming system may operate in stand alone gaming machine mode, "thick client" mode or "thin client" mode depending on the game being played, operating conditions, and so on. Other variations will be apparent to persons 25 skilled in the art. Irrespective of the form, the gaming system has several core components. At the broadest level, the core components are a player interface 50 and a game controller 30 60 as illustrated in Figure 1. The player interface is arranged to enable manual interaction between a player and the gaming system and for this purpose includes the input/output components required for the player to enter instructions to play the game and observe the game 35 outcomes. Components of the player interface may vary from 46139161 (GHMatters) P84492.AU.2 20/08/13 - 9 embodiment to embodiment but will typically include a credit mechanism 52 to enable a player to input credits and receive payouts, one or more displays 54, a game play mechanism 56 including one or more input devices that 5 enable a player to input game play instructions (e.g. to place a wager), and one or more speakers 58. The game controller 60 is in data communication with the player interface and typically includes a processor 62 10 that processes the game play instructions in accordance with game play rules and outputs game play outcomes to the display. Typically, the game play rules are stored as program code in a memory 64 but can also be hardwired. Herein the term "processor" is used to refer generically 15 to any device that can process game play instructions in accordance with game play rules and may include: a microprocessor, microcontroller, programmable logic device or other computational device, a general purpose computer (e.g. a PC) or a server. That is a processor may be 20 provided by any suitable logic circuitry for receiving inputs, processing them in accordance with instructions stored in memory and generating outputs (for example on the display). Such processors are sometimes also referred to as central processing units (CPUs). Most processors 25 are general purpose units, however, it is also know to provide a specific purpose processor using an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA). 30 A gaming system in the form of a stand alone gaming machine 10 is illustrated in Figure 2. The gaming machine 10 includes a console 12 having a display 14 on which are displayed representations of a game 16 that can be played by a player. A mid-trim 20 of the gaming machine 10 35 houses a bank of buttons 22 for enabling a player to interact with the gaming machine, in particular during game play. The mid-trim 20 also houses a credit input 46139161 (GHMatters) P84492.AU.2 20/08/13 - 10 mechanism 24 which in this example includes a coin input chute 24A and a bill collector 24B. Other credit input mechanisms may also be employed, for example, a card reader for reading a smart card, debit card or credit 5 card. Other gaming machines may configure for ticket in such that they have a ticket reader for reading tickets having a value and crediting the player based on the face value of the ticker. A player marketing module (not shown) having a reading device may also be provided for 10 the purpose of reading a player tracking device, for example as part of a loyalty program. The player tracking device may be in the form of a card, flash drive or any other portable storage medium capable of being read by the reading device. In some embodiments, the player marketing 15 module may provide an additional credit mechanism, either by transferring credits to the gaming machine from credits stored on the player tracking device or by transferring credits from a player account in data communication with the player marketing module. 20 A top box 26 may carry artwork 28, including for example pay tables and details of bonus awards and other information or images relating to the game. Further artwork and/or information may be provided on a front 25 panel 29 of the console 12. A coin tray 30 is mounted beneath the front panel 29 for dispensing cash payouts from the gaming machine 10. The display 14 shown in Figure 2 is in the form of a video 30 display unit, particularly a cathode ray tube screen device. Alternatively, the display 14 may be a liquid crystal display, plasma screen, any other suitable video display unit. The top box 26 may also include a display, for example a video display unit, which may be of the same 35 type as the display 14, or of a different type. Figure 3 shows a block diagram of operative components of 46139161 (GHMatters) P84492.AU.2 20/08/13 - 11 a typical gaming machine which may be the same as or different to the gaming machine of Figure 2. The gaming machine 100 includes a game controller 101 5 having a processor 102 mounted on a circuit board. Instructions and data to control operation of the processor 102 are stored in a memory 103, which is in data communication with the processor 102. Typically, the gaming machine 100 will include both volatile and non 10 volatile memory and more than one of each type of memory, with such memories being collectively represented by the memory 103. The gaming machine has hardware meters 104 for purposes 15 including ensuring regulatory compliance and monitoring player credit, an input/output (I/O) interface 105 for communicating with peripheral devices of the gaming machine 100. The input/output interface 105 and/or the peripheral devices may be intelligent devices with their 20 own memory for storing associated instructions and data for use with the input/output interface or the peripheral devices. A random number generator module 113 generates random numbers for use by the processor 102. Persons skilled in the art will appreciate that the reference to 25 random numbers includes pseudo-random numbers. In the example shown in Figure 3, a player interface 120 includes peripheral devices that communicate with the game controller 101 including one or more displays 106, a touch 30 screen and/or buttons 107 (which provide a game play mechanism), a card and/or ticket reader 108, a printer 109, a bill acceptor and/or coin input mechanism 110 and a coin output mechanism 111. Additional hardware may be included as part of the gaming machine 100, or hardware 35 may be omitted as required for the specific implementation. For example, while buttons or touch screens are typically used in gaming machines to allow a 46139161 (GHMatters) P84492.AU.2 20/08/13 - 12 player to place a wager and initiate a play of a game any input device that enables the player to input game play instructions may be used. For example, in some gaming machines a mechanical handle is used to initiate a play of 5 the game. Persons skilled in the art will also appreciate that a touch screen can be used to emulate other input devices, for example, a touch screen can display virtual buttons which a player can "press" by touching the screen where they are displayed. 10 In addition, the gaming machine 100 may include a communications interface, for example a network card 112. The network card may, for example, send status information, accounting information or other information 15 to a bonus controller, central controller, server or database and receive data or commands from the bonus controller, central controller, server or database. In embodiments employing a player marketing module, communications over a network may be via player marketing 20 module - i.e. the player marketing module may be in data communication with one or more of the above devices and communicate with it on behalf of the gaming machine. Figure 4 shows a block diagram of the main components of 25 an exemplary memory 103. The memory 103 includes RAM 103A, EPROM 103B and a mass storage device 103C. The RAM 103A typically temporarily holds program files for execution by the processor 102 and related data. The EPROM 103B may be a boot ROM device and/or may contain 30 some system or game related code. The mass storage device 103C is typically used to store game programs, the integrity of which may be verified and/or authenticated by the processor 102 using protected code from the EPROM 103B or elsewhere. 35 It is also possible for the operative components of the gaming machine 100 to be distributed, for example 46139161 (GHMatters) P84492.AU.2 20/08/13 - 13 input/output devices 106,107,108,109,110,111 to be provided remotely from the game controller 101. Figure 5 shows a gaming system 200 in accordance with an 5 alternative embodiment. The gaming system 200 includes a network 201, which for example may be an Ethernet network. Gaming machines 202, shown arranged in three banks 203 of two gaming machines 202 in Figure 5, are connected to the network 201. The gaming machines 202 provide a player 10 operable interface and may be the same as the gaming machines 10,100 shown in Figures 2 and 3, or may have simplified functionality depending on the requirements for implementing game play. While banks 203 of two gaming machines are illustrated in Figure 5, banks of one, three 15 or more gaming machines are also envisaged. One or more displays 204 may also be connected to the network 201. For example, the displays 204 may be associated with one or more banks 203 of gaming machines. 20 The displays 204 may be used to display representations associated with game play on the gaming machines 202, and/or used to display other representations, for example promotional or informational material. 25 In a thick client embodiment, game server 205 implements part of the game played by a player using a gaming machine 202 and the gaming machine 202 implements part of the game. With this embodiment, as both the game server and the gaming device implement part of the game, they 30 collectively provide a game controller. A database management server 206 may manage storage of game programs and associated data for downloading or access by the gaming devices 202 in a database 206A. Typically, if the gaming system enables players to participate in a Jackpot 35 game, a Jackpot server 207 will be provided to perform accounting functions for the Jackpot game. A loyalty program server 212 may also be provided. 46139161 (GHMatters) P84492.AU.2 20/08/13 - 14 In a thin client embodiment, game server 205 implements most or all of the game played by a player using a gaming machine 202 and the gaming machine 202 essentially 5 provides only the player interface. With this embodiment, the game server 205 provides the game controller. The gaming machine will receive player instructions, pass these to the game server which will process them and return game play outcomes to the gaming machine for 10 display. In a thin client embodiment, the gaming machines could be computer terminals, e.g. PCs running software that provides a player interface operable using standard computer input and output components. Other client/server configurations are possible, and further details of a 15 client/server architecture can be found in WO 2006/052213 and PCT/SE2006/000559, the disclosures of which are incorporated herein by reference. Servers are also typically provided to assist in the 20 administration of the gaming network 200, including for example a gaming floor management server 208, and a licensing server 209 to monitor the use of licenses relating to particular games. An administrator terminal 210 is provided to allow an administrator to run the 25 network 201 and the devices connected to the network. The gaming system 200 may communicate with other gaming systems, other local networks, for example a corporate network, and/or a wide area network such as the Internet, 30 for example through a firewall 211. Persons skilled in the art will appreciate that in accordance with known techniques, functionality at the server side of the network may be distributed over a 35 plurality of different computers. For example, elements may be run as a single "engine" on one server or a separate server may be provided. For example, the game 46139161 (GHMatters) P84492.AU.2 20/08/13 - 15 server 205 could run a random generator engine. Alternatively, a separate random number generator server could be provided. Further, persons skilled in the art will appreciate that a plurality of game servers could be 5 provided to run different games or a single game server may run a plurality of different games as required by the terminals. Further detail of gaming system 10 The player operates the game play mechanism 56 to specify a wager and hence the win entitlement which will be evaluated for this play of the game and initiates a play of the game. Persons skilled in the art will appreciate 15 that a player's win entitlement will vary from game to game dependent on player selections. In most spinning reel games, it is typical for the player's entitlement to be affected by the amount they wager and selections they make (i.e. the nature of the wager). For example, a 20 player's win entitlement may be based on how many lines they play in each game - e.g. a minimum of one line up to the maximum number of lines allowed by the game (noting that not all permutations of win lines may be available for selection) and how much they wager per line. Such win 25 lines are typically formed by a combination of symbol display positions, one from each reel, the symbol display positions being located relative to one another such that they form a line. 30 In many games, the player's win entitlement is not strictly limited to the lines they have selected, for example, "scatter" pays are awarded independently of a player's selection of pay lines and are an inherent part of the win entitlement. 35 Persons skilled in the art, will appreciate that in other embodiments, the player may obtain a win entitlement by 46139161 (GHMatters) P84492.AU.2 20/08/13 - 16 selecting a number of reels to play and an amount to wager per reel. Such games are marketed under the trade name "Reel Power" by Aristocrat Leisure Industries Pty Ltd. The selection of the reel means that each displayed symbol 5 of the reel can be substituted for a symbol at one or more designated display positions. In other words, all symbols displayed at symbol display positions corresponding to a selected reel can be used to form symbol combinations with symbols displayed at a designated, symbol display 10 positions of the other reels. For example, if there are five reels and three symbol display positions for each reel such that the symbol display positions comprise three rows of five symbol display positions, the symbols displayed in the centre row are used for non-selected 15 reels. As a result, the total number of ways to win is determined by multiplying the number of active display positions of each reels, the active display positions being all display positions of each selected reel and the designated display position of the non-selected reels. As 20 a result for five reels and fifteen display positions there are 243 ways to win. In Figure 6, the processor 62 of game controller 60 is shown implementing a number of modules based on program 25 code and data stored in memory 64. Persons skilled in the art will appreciate that various of the modules could be implemented in some other way, for example by a dedicated circuit. 30 These modules include the outcome generator 622 which operates in response to the player's operation of game play mechanism 56 to place a wager and initiate a play of the game and generates a game outcome which will then be evaluated by award evaluator 623. In an embodiment, to 35 generate a game outcome, a symbol selector 622A of the outcome generator selects symbols from a set of symbols specified by symbol data 641 using random number generator 46139161 (GHMatters) P84492.AU.2 20/08/13 - 17 621. The selected symbols are advised to the display controller 624 which causes them to be displayed on display 54 at a set of symbol display positions comprising a plurality of subsets of symbol display positions. 5 In the embodiment, the symbol data specifies a plurality of spinning reels. For each reel there are a plurality of symbol positions on the reel, for example 20-24 symbol positions. As is known in the art, the symbol positions 10 of a reel have a defined circular sequence with the last symbol position (e.g. symbol position 22) being followed by the first symbol position in the sequence. Accordingly, the symbol selector 622A selects all of the symbols for each of the reels by selecting a stopping 15 position in the sequence for the respective reel. For example, if the symbol display positions are arranged in a plurality of columns and rows, one row may correspond to the stopping position. Persons skilled in the art will appreciate that it is known to use a probability table 20 stored in memory 64 to vary the odds of a particular stop position being selected. In the embodiment, at least one subset of display positions is associated with two or more reels. In one 25 example, there are fifteen symbol display positions which are displayed on display 54 in a matrix made up of five columns and three rows, and two reels correspond to the central column. For each subset of display positions associated with two or more reels, the symbol selector 30 selects stopping positions for each reel independently of the other reel or reels. In the embodiment, two reels are associated with a subset of display positions. The selected symbols are then combined by symbol combiner 35 622b applying at least one symbol combination rule 642a. The symbol combination rules 642a may be related to the nature of the symbols and/or the nature of the reels. For 46139161 (GHMatters) P84492.AU.2 20/08/13 - 18 example, in some embodiments, each reel of those which are to be combined has a symbol at each symbol position on the reel. In other embodiments, one of the reels only has symbols at some of the symbol positions. Accordingly, in 5 embodiments where there are symbols on each symbol position on both reels, each pair of symbols which are selected for the same symbol display position will need to be combined. In other embodiments, where one of the reels only has symbols at some of the symbol display positions, 10 symbols will only need to be combined upon two symbols being selected for the same symbol display position. In one example, the symbols from one reel are base symbols and the symbols from another reel are modifier symbols. 15 Each combination symbol is formed by the modifier symbols being added to the base symbols such that both the symbols originally selected are displayed but they form a composite symbol having both the base symbol and the modifier. In other embodiments, the symbols may be 20 combined based on precedence rules. For example, a special symbol, such as a wild or a scatter symbol may take precedence over other symbols. For example, if a wild symbol is selected for a position (being a symbol which can take the place of any other symbol in the symbol 25 combination) then a modifier symbol is not applied. In other embodiments, other precedence rules may be applied such that only one of two separate symbols selected for the position is displayed. 30 In one example using base and modifier symbols, the base symbols are the rank symbols of a set of cards (e.g. Ace, King, Queen, Jack, 10, 9 etc) and the modifier symbols are the suits: hearts, spades, clubs and diamonds. Accordingly, in this embodiment, the modifier applies a 35 suit to the relevant rank. In this embodiment, different rank symbols may take on different suits from game round to game round. In such embodiments, the composite symbol 46139161 (GHMatters) P84492.AU.2 20/08/13 - 19 may be displayed in a number of ways. In one example, the ranking card is transformed depending on the suit. For example, a King of hearts looks different to a King of clubs. In other embodiments, the base symbol may not be 5 altered. In another example, the reel symbols of the base reel may include a combination of ranking symbols and other symbols and only ranking symbols acquire a suit under the combination rule. 10 In the embodiment, the reels for a subset of display positions are displayed by a display controller 624 as spinning independently. For example, by firstly spinning the reel having the base symbols and secondly spinning the reel having the modifier symbols. The display 54 is 15 controlled by the display controller 624. After the symbols have been selected, outcome evaluator 623 evaluates the symbols based on the pay table 643. In one example, the pay table contains some entries which 20 corresponds to a composite symbol. For example, a winning combination comprised of four Aces including the central reel may have a higher payout in pay table 643 when the central symbol is a heart than a combination where the central symbol is a club. Alternatively, or in addition, 25 the modifier symbols may modify the function of a symbol, such that a symbol with a modifier can participate in winning certain combinations whereas a symbol without a modifier cannot. In one example, in addition to five of a kind or other "of a kind" type winning combinations in the 30 pay table, other types of winning combinations may be available for symbol combinations which include a modifier symbol. For example, winning combinations made up of symbols having the same modifier. 35 Once the outcome evaluator 623 has evaluated the displayed symbols, if there is any win, the outcome evaluator causes the display controller to display the win and updates the 46139161 (GHMatters) P84492.AU.2 20/08/13 - 20 win meters of win meter data 644. A method of the embodiment is summarised in Figure 7. The method 700 involves determining 710stopping positions for 5 a plurality of reels. Determining 720 whether there are two or more symbols at a display position and upon there being two or more symbols, combining those symbols 730. The symbols are then displayed 740 on display 54 and evaluated 750 by the outcome evaluator 623. Persons 10 skilled in the art will appreciate that embodiments where there are expected to be two or more symbols at each display position, it is not strictly necessary to determine whether there are two or more symbols and the method can proceed directly to combining symbols in 15 accordance with the symbol combination rules. Further aspects of the method will be apparent from the above description of the system. It will be appreciated that at least part of the method will be implemented 20 digitally by a processor. Persons skilled in the art will also appreciate that the method could be embodied in program code. The program code could be supplied in a number of ways, for example on a tangible computer readable storage medium, such as a disc or a memory (for 25 example, that could replace part of memory 103) or as a data signal (for example, by transmitting it from a server). Persons skilled in the art, will appreciate that program code provides a series of instructions executable by the processor. 30 In the embodiment, the game is provided as a base game which is a part of the game which is carried out each time the player makes a wager, typically irrespective of the wager, whereas other parts of the game will only be 35 carried out occasionally for example if a condition is met such as a trigger occurring or if an ante bet is placed (depending on the specific embodiment). In such 46139161 (GHMatters) P84492.AU.2 20/08/13 - 21 embodiments, the outcome generator generates additional parts of the game outcome based on game rule data 642. For example, a feature game may be provided. Persons skilled in the art will appreciate that a feature game 5 involves some additional element of game play which usually only occurs when a trigger condition is met. Types of feature games include: those where a series of free game events are awarded such as free games or re spins (where some reels are held while others are re 10 spun); games where the symbols on the reel are changed; and "second screen" games where game play is totally different to the base game, for example where the player makes selections in a "pick a box type" game. In another embodiment, the game could be provided as the feature 15 game, e.g. symbols are selected from two or more sets for a reel in a triggered free game series. The trigger event may be, a symbol combination in the game, occurrence of a specific symbol in the game, 20 purchased, be caused by another connected system, based on turnover, based on a random evaluation, etc. In some embodiments, the feature of symbols being selected from two or more reels for one or more of the columns of 25 symbol display positions may only be provided if an eligibility criteria is met, for example that the player has made a certain sized wager, made an ante bet, selected all win lines, played sufficient games, or the player is a member of a loyalty program. 30 Persons skilled in the art will appreciate that more than two reels could be combined to allow for more permutations of possible composite symbols. Further, any number of subsets of display positions could be associated with two 35 or more reels. In another embodiment, the number of reels associated with a subset of display positions could vary during the game. In another embodiment the number of 46139161 (GHMatters) P84492.AU.2 20/08/13 - 22 subsets of display positions associated with two or more reels could vary during the game. Example 5 Figure 8a shows an example where there is a base reel 810 and a modifier reel 820 which are used to select symbols for a single set of display positions. Figure 8a shows the two reels having been stopped. The base reel has a 10 Jack symbol at position 811, a wild symbol at position 812 and an Ace symbol at position 813. The modifier reel has a diamond symbol at position 821, no modifier symbol at symbol position 822 and a club symbol at position 823. Accordingly, as shown in Figure 8b, a composite outcome 15 reel 830 is then produced having a Jack of diamonds symbol 831, a wild symbol 832 and an Ace of clubs symbol 833. Figure 9 then shows an example of the display 900 of a plurality of display positions where the composite reel 20 913 is displayed at a middle column 913 of 5 columns 911, 912, 914 and 915. In the example, there are three pay lines corresponding to respective ones of the rows of symbols 901, 902, 903. 25 Under the rules of the game, winning combinations are evaluated left to right with the exception that awards for a straight of symbols can be evaluated independently of the order of the symbols if a modifier symbol is applied. Accordingly, in the example, the player receives two 30 awards for the symbol combinations shown in Figure 9. The player wins a first award for four Aces of clubs because the Ace symbol on win line 903 has a club symbol applied to it. The player also wins for a straight comprised of the Ace, King, Jack, Queen and 10 on line 901 because the 35 diamond symbol means that the Jack symbol can be evaluated out of order. That is, absent a diamond symbol this would not have been a winning combination as it would have been 46139161 (GHMatters) P84492.AU.2 20/08/13 - 23 evaluated left to right, requiring the Queen and Jack to be reversed. It will be understood to persons skilled in the art of the 5 invention that many modifications may be made without departing from the spirit and scope of the invention, in particular it will be apparent that certain features of embodiments of the invention can be employed to form further embodiments. 10 It is to be understood that, if any prior art is referred to herein, such reference does not constitute an admission that the prior art forms a part of the common general knowledge in the art in any country. 15 In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as 20 "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention. 46139161 (GHMatters) P84492.AU.2 20/08/13

Claims (30)

1. A method of gaming in a gaming system, the method comprising: 5 selecting symbols for display at a plurality of subsets of symbol display positions by independently determining stopping positions of reels of symbols associated with the subsets of display positions, wherein at least one subset of symbol display positions is 10 associated with two or more reels and upon two or more symbols being selected for the same symbol display position at least one symbol combination rule is applied to the two or more symbols to determine a resultant symbol for display; and 15 evaluating the displayed symbols to determine whether to make an award.

2. A method of gaming as claimed in claim 1, wherein one of the two or more reels is a base reel comprising symbols 20 at each of a plurality of symbol positions of the reel.

3. A method of gaming as claimed in claim 2, wherein another of the two or more reels is a modifier reel comprising symbols at a subset of a plurality of symbol 25 positions of the reel.

4. A method of gaming as claimed in claim 1, wherein each reel comprises a symbol at each of the plurality of symbol positions of the reel. 30

5. A method as claimed in any one of claims 1 to 4, wherein each subset of display positions is a column of display positions. 35

6. A method as claimed in any one of claims 1 to 5, wherein a symbol combination rule is that the symbols are combined such that each resultant symbol is a composite 46139161 (GHMatters) P84492.AU.2 20/08/13 - 25 symbol formed from the combined symbols.

7. A method as claimed in claim 6, wherein evaluating the displayed symbols comprises comparing the displayed 5 symbols to a prize table containing at least one entry corresponding to a possible composite symbol.

8. A method as claimed in any one of claims 1 to 7, wherein a symbol combination rule that applies to at least 10 one symbol is that the at least one symbol overrides any other symbol such the at least one symbol is displayed unmodified.

9. A method as claimed in any one of claims 1 to 8, 15 wherein the evaluation is based on a wager which applies to evaluation of the symbols.

10. A gaming system comprising: a display for displaying symbols at a plurality of 20 subsets of symbol display positions; a memory storing a plurality of reels of symbols associated with the subsets of display positions, at least one subset of display positions being associated with two or more reels; 25 a symbol selector arranged to select symbols for display at the plurality of subsets of symbol display positions by independently determining stopping positions of reels of symbols associated with the subsets of display positions, wherein at least one subset of symbol display 30 positions is associated with two or more reels and upon two or more symbols being selected for the same symbol display position at least one symbol combination rule is applied to the two or more symbols by the game controller to determine a resultant symbol for display; and 35 a symbol evaluator arranged to evaluate the displayed symbols to determine whether to make an award. 46139161 (GHMatters) P84492.AU.2 20/08/13 - 26

11. A gaming system as in claim 10, wherein one of the two or more reels is a base reel comprising symbols at each of a plurality of symbol positions of the reel. 5

12. A gaming system as claimed in claim 11, wherein another of the two or more reels is a modifier reel comprising symbols at a subset of a plurality of symbol positions of the reel. 10

13. A gaming system as claimed in claim 10, wherein each reel comprises a symbol at each of the plurality of symbol positions of the reel.

14. A gaming system as claimed in any one of claims 10 to 15 13, wherein each subset of display positions is a column of display positions.

15. A gaming system as claimed in any one of claims 10 to 14, wherein a symbol combination rule is that the symbols 20 are combined such that each resultant symbol is a composite symbol formed from the combined symbols.

16. A gaming system as claimed in claim 15, the symbol evaluator evaluates the displayed symbols by comparing the 25 displayed symbols to a prize table containing at least one entry corresponding to a possible composite symbol.

17. A gaming system as claimed in any one of claims 10 to 16, wherein a symbol combination rule that applies to at 30 least one symbol is that the at least one symbol overrides any other symbol such the at least one symbol is displayed unmodified.

18. A gaming system as claimed in any one of claims 10 to 35 17, wherein the evaluation is based on a wager which applies to evaluation of the symbols. 46139161 (GHMatters) P84492.AU.2 20/08/13 - 27

19. A game controller for a gaming system, the game controller arranged to: select symbols for display at a plurality of subsets of symbol display positions by independently determining 5 stopping positions of reels of symbols associated with the subsets of display positions, wherein at least one subset of symbol display positions is associated with two or more reels and upon two or more symbols being selected for the same symbol display position at least one symbol 10 combination rule is applied to the two or more symbols by the game controller to determine a resultant symbol for display; and evaluate the displayed symbols to determine whether to make an award. 15

20. A game controller as claimed in claim 19, wherein one of the two or more reels is a base reel comprising symbols at each of a plurality of symbol positions of the reel. 20

21. A game controller as claimed in claim 20, wherein another of the two or more reels is a modifier reel comprising symbols at a subset of a plurality of symbol positions of the reel. 25

22. A game controller as claimed in claim 19, wherein each reel comprises a symbol at each of the plurality of symbol positions of the reel.

23. A game controller as claimed in any one of claims 19 30 to 22, wherein each subset of display positions is a column of display positions.

24. A game controller as claimed in any one of claims 19 to 23, wherein a symbol combination rule is that the 35 symbols are combined such that each resultant symbol is a composite symbol formed from the combined symbols. 46139161 (GHMatters) P84492.AU.2 20/08/13 - 28

25. A game controller as claimed in claim 24, arranged to evaluate the displayed symbols by comparing the displayed symbols to a prize table containing at least one entry corresponding to a possible composite symbol. 5

26. A game controller as claimed in any one of claims 19 to 25, wherein a symbol combination rule that applies to at least one symbol is that the at least one symbol overrides any other symbol such the at least one symbol is 10 displayed unmodified.

27. A game controller as claimed in any one of claims 19 to 26, wherein the evaluation is based on a wager which applies to evaluation of the symbols. 15

28. A gaming system comprising: a display means for displaying symbols at a plurality of subsets of symbol display positions; a plurality of reels of symbols associated with the 20 subsets of display positions, at least one subset of display positions being associated with two or more reels; means for selecting symbols for display at a plurality of subsets of symbol display positions by independently determining stopping positions of reels of 25 symbols associated with the subsets of display positions, at least one subset of display positions being associated with two or more reels such that the means for selecting symbols (a) selects stopping positions for the two or more reels, and, upon two or more symbols being selected for a 30 symbol display position, (b) applies at least one symbol combination rule to the two or more symbols to determine a resultant symbol for display; and means for evaluating the displayed symbols to determine whether to make an award. 35 46139161 (GHMatters) P84492.AU.2 20/08/13 - 29

29. Computer program code which when executed implements the method of any one of claims 1 to 9.

30. A tangible computer readable medium comprising the 5 computer program code of claim 29. 46139161 (GHMatters) P84492.AU.2 20/08/13