AU2012202245A1 - A gaming system and method of gaming - Google Patents

Abstract

Abstract A gaming system (10, 40, 100, 200) is disclosed which is arranged to randomly display a plurality of symbols from a 5 set of symbols (14). The gaming system comprises a function allocator (26) arranged to allocate a function to at least one symbol selected from the set of symbols (14), and a game outcome generator (28) arranged to determine a game outcome based on the displayed symbols and on the 10 function allocated to the selected symbol. A corresponding method, computer program and computer readable medium having computer readable program code embodied therein are also disclosed. 3303300_1 (GHMattes) P01326.AU.3 Outcome generator Function RNG Symbol allocator selector 22 1-" 1 20 Function 24 selector 12 Memory 14 Sybl Functions Game instructions -- 18 Fig. 1

Description

AUSTRALIA Patents Act 1990 COMPLETE SPECIFICATION Standard Patent Applicant: Aristocrat Technologies Australia Pty Limited Invention Title: A GAMING SYSTEM AND A METHOD OF GAMING The following statement is a full description of this invention, including the best method for performing it known to us: - 2 A GAMING SYSTEM AND A METHOD OF GAMING Field of the Invention 5 The present invention relates to a gaming system and to a method of gaming. Background of the Invention 10 It is known to provide a gaming system which comprises a game controller arranged to randomly display several symbols from a predetermined set of symbols and to determine a game outcome such as a game win based on the displayed symbols. Such gaming systems may commonly be 15 implemented as a stepper machine provided with reels with each reel carrying several symbols of the set, or a video machine wherein selected symbols are displayed on virtual reels on a graphical display device. 20 While such gaming systems are popular with game players, the ability to modify characteristics of a game and thereby enhance player amusement is limited because the set of symbols is fixed. Indeed, in some jurisdictions in order to comply with gaming regulations it is necessary to 25 keep the reel strip lengths and symbols constant. Summary of the Invention In accordance with a first aspect of the present 30 invention, there is provided a gaming system arranged to randomly display a plurality of symbols from a set of symbols, the gaming system comprising: a function allocator arranged to allocate a function to at least one symbol selected from the set of symbols, wherein 35 allocation of the function is based on a random selection of a special symbol from a plurality of special symbols; and 3303308.1 (GHMttsm) P61326 AU3 - 3 a game outcome generator arranged to determine a game outcome based on the displayed symbols and on the function allocated to the selected symbol; wherein the set of symbols comprises a plurality of 5 standard symbols with at least one of the standard symbols having the special symbol incorporated into the standard symbol; and wherein the function allocator is arranged to allocate a function to a standard symbol incorporating the 10 special symbol when the special symbol is separately displayed. In one arrangement, the function allocator is arranged to allocate a function to at least one symbol selected from 15 the plurality of displayed symbols. In one embodiment, a special symbol may be incorporated into a standard symbol as a background symbol, as a superimposed symbol, as a double symbol, or by alternately 20 displaying the standard symbol and the special symbol. The incorporated special symbol may be a number. With this embodiment, allocation of a new function to a symbol may be communicated to a player by displaying a number, 25 which may be pseudo randomly selected, and the function allocator may be arranged to allocate a function to all symbols which have a number which accords to a particular relationship. The relationship may be that the displayed number is the same, greater than, or less than the number 30 incorporated into the symbol. In a further alternative embodiment, selection of a symbol may be communicated to a player by modifying the appearance of a symbol, such as by animating the symbol or 35 changing the colour of the symbol. The gaming system may comprise a plurality of rotatable physical reels or a plurality of virtual reels displayable 3303306_1 (GHMatimes) P61326 AU.3 -4 on a graphical display device, with each reel including a plurality of associated symbols. In an implementation which includes a plurality of 5 rotatable physical reels, selection of a symbol may be communicated to a player by emphasising a displayed symbol, such as by illuminating the displayed symbol at an increased intensity relative to other displayed symbols, or by illuminating a selected symbol with light of a 10 different colour to other displayed symbols. It will also be understood that a function may be allocated to a selected symbol for one game, with the symbol returning to its normal significance for subsequent 15 games, or the function may by allocated to a selected symbol for multiple successive games. In a further alternative embodiment, the gaming system is arranged to facilitate selection of a symbol by an 20 external system in communication with the gaming system, or by another player. In one arrangement, the gaming system is arranged to select a symbol and to allocate a function to the selected 25 symbol when a predefined trigger condition exists, which may be display of a predefined other symbol, or display of graphical indicia, for example a representation of a woman, which may occur pseudo randomly. The predefined other symbol may be a function symbol and the gaming 30 system may be arranged to allocate the function associated with the function symbol to the selected symbol when the function symbol is displayed. If more than one other symbol or if multiple graphical indicia appear on the display, a function may be allocated to a selected symbol 35 for each displayed other symbol or graphical indicia. 3303306_1 (GHMatters) P613286AU.3 - 5 In one embodiment, the gaming system is operable in normal game mode and special game mode and the function allocator is arranged to allocate a function to a selected symbol only when the gaming system is operating in the special 5 game mode. The gaming system may be arranged to commence special game mode either automatically or in response to player input when a predetermined game outcome occurs. Special game mode may comprise 3 games. 10 In one arrangement, the gaming system is arranged to select a plurality of symbols and the function allocator is arranged to allocate a function to each symbol. The symbols may be disposed in a plurality of reels and symbols in one or more reels may be selected. In one 15 variation, the number of symbols selected may progressively increase with successive games. In another variation, successive allocated functions may be different. 20 The function allocated to a symbol may be a wild function, a scatter function, a repeat win function, a multiplier function, a jackpot function or a feature commencement function. 25 The gaming system may be implemented as a stand alone gaming machine or across a network. In accordance with a second aspect of the present invention, there is provided a method of gaming 30 comprising: providing a set of symbols comprising a plurality of standard symbols with at least one of the standard symbols having a special symbol incorporated into the standard symbol; 35 randomly displaying a plurality of symbols from the set of symbols; 3303306_1 (GHMattsm) P61326.AU.3 - 6 allocating a function to a selected symbol from the set of symbols based on a random selection of a special symbol from a plurality of special symbols; allocating a function to a standard symbol 5 incorporating the special symbol when the special symbol is separately displayed; and determining a game outcome based on the displayed symbols and on the function allocated to the selected symbol. 10 In accordance with a third aspect of the present invention, there is provided a computer program arranged when loaded into a computer to instruct the computer to operate in accordance with a gaming system arranged to 15 randomly display a plurality of symbols from a set of symbols, the gaming system comprising: a function allocator arranged to allocate a function to at least one symbol selected from the set of symbols; 20 and a game outcome generator arranged to determine a game outcome based on the displayed symbols and on the function allocated to the selected symbol. 25 In accordance with a fourth aspect of the present invention, there is provided a computer readable medium having computer readable program code embodied therein for causing a computer to operate in accordance with a gaming system arranged to randomly display a plurality of symbols 30 from a set of symbols, the gaming system comprising: a function allocator arranged to allocate a function to at least one symbol selected from the set of symbols; and a game outcome generator arranged to determine a game 35 outcome based on the displayed symbols and on the function allocated to the selected symbol. 33033061 (GHMfters) P61326AU.3 -7 Brief Description of the Drawings The present invention will now be described, by way of example only, with reference to the accompanying drawings, 5 in which: Figure 1 is a diagrammatic block diagram of a gaming system in accordance with an embodiment of the present invention; Figure 2 is a diagrammatic representation of a gaming 10 system in accordance with an embodiment of the present invention with the gaming system implemented in the form of a stand alone gaming machine; Figure 3 is a schematic block diagram of operative components of the gaming machine shown in Figure 2; 15 Figure 4 is a schematic block diagram of components of a memory of the gaming machine shown in Figure 2; Figure 5 is a schematic diagram of a gaming system in accordance with an alternative embodiment of the present invention with the gaming system implemented over a 20 network; Figure 6 is a flow diagram illustrating game play of a gaming system in accordance with an embodiment of the present invention; Figure 7 is a flow diagram illustrating game play of 25 a gaming system in accordance with an alternative embodiment of the present invention; and Figure 8 is a diagrammatic representation of example symbols displayed by a gaming system in accordance with an embodiment of the present invention. 30 Description of an Embodiment of the Invention Referring to the drawings, there is shown a gaming system 10 arranged to implement a probabilistic game of the type 35 wherein several symbols from a set of symbols are randomly displayed and a game outcome is determined on the basis of 33033061 (GHMattrn) P61326 AU.3 - 8 the displayed symbols. With some such probabilistic games, the set of symbols include standard symbols at least one of which is a function symbol, and the game outcome is determined on the basis of the displayed 5 standard symbols and the function associated with any displayed function symbol. For example, standard symbols may resemble fruit such as apples, pears and bananas with a win outcome being determined when a predetermined number of the same fruit appear on a display in the same line, 10 scattered, and so on. The function associated with a function symbol may be for example a wild function wherein display of the function symbol is treated during consideration of the game outcome as any of the standard symbols. A function symbol may be represented as the word 15 "WILD", a star, or by any other suitable word or symbol. Other functions are also envisaged such as scatter functions, multiplier functions, repeat win functions, jackpot functions and feature commencement functions. 20 The present gaming system operates such that one or more function symbols can effectively be added during a game so as to modify the probability of occurrence of a win outcome and thereby enhance player interest in playing the game. This is achieved by selecting one or more symbols 25 to acquire a new function and determining game outcomes based on displayed symbols and the new function. The function acquired by a symbol may be in place of or in addition to any function already associated with the symbol. 30 Referring to Figure 1, the gaming system 10 comprises a memory 12 arranged to store symbols data 14 indicative of a plurality of symbols for subsequent display to a player, function data 16 indicative of one or more functions 35 allocatable to the symbols, and game instruction data 18 3303306_1 (GHMatters) P61328 AU.3 -9 indicative of game instructions usable by the gaming machine 10 to control operation of the game. The gaming system 10 also includes a symbol selector 20 5 which is arranged to select several symbols for display to a player and in some game circumstances to select one or more symbol to which a function is to be allocated. In this example, the selection carried out by the symbol selector 20 is made using a random number generator 22. 10 It will be appreciated that the random number generator 22 may be of a type which is arranged to generate pseudo random numbers based on a seed number, and that in this specification the term "random" will be understood 15 accordingly to mean truly random or pseudo random. The gaming system 10 also comprises a function selector 24 arranged to select one or more functions for allocation to one or more symbols selected during the special game 20 circumstances, and a function allocator 26 arranged to allocate the or each function selected by the function selector 24 to one or more symbols selected during the special game circumstances. The function selector 24 may be arranged to randomly select a function or to select a 25 function on the basis of a predefined rule. The gaming system 10 also comprises an outcome generator 28 which in accordance with the game instructions 18 determines game outcomes based on the symbols selected for 30 display to a player by the symbol selector 20, and on the basis of the function(s) allocated to one or more selected symbols, if any. In the embodiments described below, the symbol selector 35 20, the function selector 24, the function allocator 26, and the outcome generator 28 are at least partly 330330_1 (GHMaters) P61326.AU.3 - 10 implemented using a microprocessor, although it will be understood that other implementations are envisaged. The gaming system 10 can take a number of different forms. 5 In a first form, a stand alone gaming machine is provided wherein all or most components required for implementing the game are present in a player operable gaming machine. 10 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 game are located remotely relative to the gaming machine. 15 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" architecture may be used wherein most of the game is 20 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. 25 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 gaming server are selectively modifiable. For example, 30 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 skilled in the art. 35 A gaming system in the form of a stand alone gaming 3303308_1 (GHMatters) P81326.AU.3 - 11 machine 40 is illustrated in Figure 2. The gaming machine 40 includes a console 42 having a display 44 on which is displayed representations of a game 46 that can be played by a player. A mid-trim 50 of the gaming machine 40 5 houses a bank of buttons 52 for enabling a player to interact with the gaming machine, in particular during gameplay. The mid-trim 50 also houses a credit input mechanism 54 which in this example includes a coin input chute 54A and a bill collector 54B. Other credit input 10 mechanisms may also be employed, for example, a card reader for reading a smart card, debit card or credit card. A reading device may also be provided for the purpose of reading a player tracking device, for example as part of a loyalty program. The player tracking device 15 may be in the form of a card, flash drive or any other portable storage medium capable of being read by the reading device. A top box 56 may carry artwork 58, including for example 20 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 panel 59 of the console 42. A coin tray 60 is mounted beneath the front panel 59 for dispensing cash payouts 25 from the gaming machine 40. The display 44 is in the form of a video display unit, particularly a cathode ray tube screen device. Alternatively, the display 44 may be a liquid crystal 30 display, plasma screen, any other suitable video display unit. The top box 56 may also include a display, for example a video display unit, which may be of the same type as the display 44, or of a different type. 35 The display 44 in this example is arranged to display representations of several reels, each reel of which has 3303300.1 (GHMatter) P61326 AU.3 - 12 several associated symbols. Typically 3, 4 or 5 reels are provided. During operation of the game, the reels first appear to rotate then stop with typically three symbols visible on each reel. Game outcomes are determined on the 5 basis of the visible symbols together with any special functions associated with the symbols. It will be understood that instead of providing a video display unit which displays representations of reels, 10 actual reels may be used. Such gaming machines including actual rotatable reels are commonly termed stepper machines. Figure 3 shows a block diagram of operative components of 15 a typical gaming machine 100 which may be the same as or different to the gaming machine shown in Figure 2. The gaming machine 100 include a game controller 101 having a processor 102. Instructions and data to control 20 operation of the processor 102 in accordance with the present invention are stored in a memory 103 which is in data communication with the processor 102. Typically, the gaming machine 100 will include both 25 volatile and non-volatile memory and more than one of each type of memory, with such memories being collectively represented by the memory 103. Figure 4 shows a block diagram of the main components of 30 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 35 some system or game related code. The mass storage device 103C is typically used to store game programs, the 3303306_1 (GHMatters) P61326.AU.3 - 13 integrity of which may be verified and/or authenticated by the processor 102 using protected code from the EPROM 103B or elsewhere. 5 The gaming machine has hardware meters 104 for purposes including ensuring regulatory compliance and monitoring player credit, an input/output (I/0) interface 105 for communicating with a player interface 120 of the gaming machine 100, the player interface 120 having several 10 peripheral devices. The input/output interface 105 and/or the peripheral devices may be intelligent devices with their 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 15 generates random numbers for use by the processor 102. In the example shown in Figure 3, the peripheral devices that communicate with the game controller 101 comprise one or more displays 106, a touch screen and/or bank of 20 buttons 107, 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 may be omitted as required for the specific 25 implementation. 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 30 information, accounting information or other information to a central controller, server or database and receive data or commands from the central controller, server or database. 35 It is also possible for the operative components of the gaming machine 100 to be distributed, for example 3303308_1 (GHMatters) P51326.AU.3 - 14 input/output devices 106,107,108,109,110,111 may be provided remotely from the game controller 101. Figure 5 shows a gaming system 200 in accordance with an S alternative embodiment. The gaming system 200 includes a network 201, which for example may be an Ethernet network, a LAN or a WAN. In this example, three banks 203 of two gaming machines 202 are connected to the network 201. The gaming machines 202 provide a player operable interface 10 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 or more gaming machines are 15 also envisaged. One or more displays 204 may also be connected to the network 201. The displays 204 may, for example, 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, a 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 205 and the gaming machine 202 implement part of the game, 30 they 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 monitor and carry out the Jackpot game. 3303306.1 (G HMatters) P61325.AU3 - 15 In a thin client embodiment, the game server 205 implements most or all of the game played by a player using a gaming machine 202 and the gaming machine 202 5 essentially provides only the player interface. With this embodiment, the game server 205 provides the game controller. The gaming machine will receive player instructions, and pass the instructions to the game server which will process them and return game play outcomes to 10 the gaming machine for 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. 15 Servers are also typically provided to assist in the administration of the gaming system 200, including for example a gaming floor management server 208 and a licensing server 209 to monitor the use of licenses 20 relating to particular games. An administrator terminal 210 is provided to allow an administrator to monitor the network 201 and the devices connected to the network. The gaming system 200 may communicate with other gaming 25 systems, other local networks such as a corporate network, and/or a wide area network such as the Internet, for example through a firewall 211. Persons skilled in the art will appreciate that in 30 accordance with known techniques, functionality at the server side of the network may be distributed over a 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 35 server 205 could run a random number generator engine. Alternatively, a separate random number generator server 330330.1 (GHMatters) POI326.AU.3 - 16 could be provided. During operation, the game controller, whether implemented in a stand alone gaming machine 40, 100 or over a network 5 201, implements a probabilistic game wherein at least some functions which contribute to game outcomes are allocatable during game play. Examples of specific implementations of the gaming system 10 will now be described in relation to a stand alone gaming machine 40, 100, although it will be understood that implementation may also be carried out using other gaming system architectures such as a network architecture of the type shown in Figure 5. 15 In one embodiment, reels comprising standard symbols are provided, at least some of the standard symbols having an additional special symbol incorporated into the standard symbol as a background symbol, a superimposed symbol or a 20 double symbol as illustrated by first, second and third symbols 280, 282 and 284 respectively in Figure 8. In one variation (not shown), the special symbol is a number incorporated into a standard symbol. 25 Win outcomes are determined on the basis of the symbols visible when the reels stop rotating, and in this example three symbols are displayed on each reel at any time. A win outcome may occur based on occurrence of the same symbol along a horizontal or diagonal line, as scattered 30 symbols, or in any other predefined way. A win outcome may also occur on the basis of one or more standard symbols in combination with at least one function symbol having a predefined dedicated function. For example a function symbol may correspond to a wild function, a 35 scatter function, a multiply function, a repeat win function, and so on. 3303306.1 (GHMatters) P61326 AU.3 - 17 During special game mode, or in some embodiments during normal game play, one or more symbols are selected to acquire a function. In some embodiments, the selected 5 symbol is chosen from symbols shown on the display 106. In other embodiments, the selected symbol is chosen from all available symbols and, as such, the selected symbol may not be shown on the display and allocation of a function to the selected symbol will as a consequence not 10 necessarily affect the outcome of the game. In the present embodiment, a new function allocated to a symbol is communicated to a player by separately displaying a representation of a special symbol on the 15 gaming machine 40, 100. For example, with the example shown in Figure 8, the standard symbol is a queen and the special symbol is a star and allocation of a function to the standard symbol may be communicated to a player by separately displaying a star on the gaming machine 40, 20 100. During a game, when the star is separately displayed on the gaming machine, one or more queen symbols having an incorporated star symbol acquire the function associated with the star. 25 It will be understood that allocation of a new function to a symbol may be communicated to a player in other ways including displaying a message on a player tracking module, displaying a message on a credit meter device, or in any other suitable way. 30 For example, allocation of a new function to a symbol may be communicated to a player by modifying the appearance of a symbol, such as by animating the symbol, changing the colour of the symbol, and so on. 35 3303308_1 (GHM.tter) PSI328.AU.3 - 18 In an embodiment wherein at least some symbols include a number incorporated into the symbol, allocation of a new function to a symbol may be communicated to a player by displaying a number, which may be pseudo randomly 5 selected. With this embodiment, all symbols which have a number which accords to a particular relationship may be caused to acquire a function. The relationship may be that the displayed number is the same as, greater than, or less than the number incorporated into the symbol. 10 In a stepper machine implementation, allocation of a new function to a symbol may be communicated to a player by emphasising a displayed symbol, for example by illuminating the displayed symbol at an increased 15 intensity relative to other displayed symbols, by illuminating a selected symbol with light of a different colour to other displayed symbols, and so on. It will also be understood that a function may be applied 20 to all standard symbols having the corresponding incorporated special symbol, to such standard symbols in one or more specific reels, to such standard symbols in progressively increasing numbers of reels with successive games, or in any other predefined way. 25 It will also be understood that a function may be allocated to a selected symbol for one game, with the symbol returning to its normal significance for subsequent games, or the function may by allocated to a selected 30 symbol for multiple successive games. It will also be understood that more than one function may be assigned to one or more standard symbols in a game or progressively in successive games. For example, in a 35 first game, a first function may be allocated to at least one standard symbol by separately displaying a first 33033061 (GHMatters) P61326 AU.3 - 19 special symbol associated with the first function, and in a second successive game a second function may be assigned to at least one standard symbol by separately displaying a second special symbol associated with the second function. 5 In a further variation, a second function is assigned to a standard symbol located immediately adjacent the standard symbol associated with the first function. This is commonly termed "stacking". 10 Furthermore, it will be understood that a function may be allocatable to a standard symbol in all games or functions may be allocatable to standard symbols only when the gaming system operates in a special game mode. The gaming 15 system may be arranged to commence special game mode when predetermined game outcomes occur and special game mode may comprise one or more free games, in this example three free games. Special game mode may commence automatically on the basis of game outcomes determined by the gaming 20 system, or may be prompted by a player pressing a button on the gaming machine 40, 100 after the player has identified that a game outcome corresponding to special game mode requirements has occurred. 25 Special game mode may be triggered or selection of a symbol to acquire a function may be triggered by appearance of a trigger symbol or appearance of particular graphical indicia, in this example a representation of a woman, on the display. When this occurs, a symbol to 30 acquire a function is selected and the function is allocated to one or more of the selected symbol(s). If more than one trigger symbol or graphical indicia appears on the display, a corresponding number of symbols to acquire a function may be selected. 35 3303306_1 (GHMatters) P61326.AU.3 - 20 A specific example will now be described in relation to flow diagram 220 shown in Figure 6 which illustrates steps 220 to 240 of a method of gaming implemented by the gaming system according to the present embodiment. 5 In this example, three reels are provided with each reel having two 9 symbols, two queen symbols, two king symbols, one jack symbol and a wild symbol. One of the 9 symbols has a first special symbol which for example may be in the 10 form of a background star of the type shown by the first symbol 280 in Figure 8, one of the kings has a second special symbol which may for example be a superimposed star of the type shown by the second symbol 282 in Figure 8, and one of the queens has a third special symbol which 15 may be a separate star of the type shown by the third symbol 284 in Figure 8. The first, second and third special symbols have respective associated first, second and third functions. 20 The game operates such that during normal game mode no additional function is applied to the symbols on the reels; that is, the first, second and third functions associated with the first, second and third special symbols are not applied and are not taken into 25 consideration when a game outcome is assessed by the game controller. Normal game mode continues until a predetermined game outcome occurs which is recognized by the processor 102 30 and which triggers commencement of a special game mode. In this example, the predetermined outcome is scattered displayed kings, although other predetermined outcomes which trigger special game mode are envisaged, such as eligibility for re-spin games, eligibility for hold and 35 spin games, eligibility for repeat win games, eligibility for special prize schedules, and ante bet. 333306_1 (GHMatters) P61326.AU.3 - 21 When special game mode is triggered, the processor 102 in association with the random number generator 113 selects one of the special symbols and displays the selected 5 special symbol on the display 106, and the function associated with the special symbol is applied to the or each standard symbol incorporating the selected special symbol. The game outcome is then determined by the processor 102 based on the displayed standard symbols and 10 on the function associated with any displayed special symbol. In the event of a win outcome, a prize is paid to the player. In a second free game, in addition to the first special 15 symbol, a second special symbol is also displayed on the display 106 and the game outcome is determined by the processor 102 based on the displayed standard symbols and any additional function associated with the displayed first and second special symbols. 20 Similarly with a third free game, a third special symbol is displayed on the display 106 and the game outcome is determined based on the displayed standard symbols and any additional function associated with displayed first, 25 second and third special symbols. While the above example is in the form of a stepper machine with actual reels, it will be understood that a similar implementation can be achieved using a video based 30 gaming system. With this variation, instead of permanently providing some of the symbols with incorporated special symbols, the special symbols may be dynamically added or removed as determined by the game controller. This embodiment also allows incorporation of 35 special symbols into standard symbols on the reels to be achieved in other ways such as by alternately displaying 3303308_1 (GHMMrs) P01320.AU.3 - 22 standard and special symbols in the same location on a virtual reel. In a second embodiment, a function is allocated to a 5 symbol by nominating a standard symbol and allocating a new function to the standard symbol. As with the first embodiment described above, game outcomes are determined by the processor 102 on the basis 10 of the symbols visible when the reels stop rotating, and a win outcome may occur based on display of the same symbol along a horizontal or diagonal line, as scattered symbols, or in any other predefined way. 15 In the present embodiment, a new function is allocated to a symbol by separately displaying a representation on the display 106 of the gaming machine 40, 100 of one or more of the standard symbols. For example, if the standard symbols include a 9, a jack, a queen, a king and a wild 20 symbol, a function may be allocated to the 9 symbol by separately displaying the 9 symbol on the gaming machine. During a game, when the 9 symbol is separately displayed, one or more 9 symbols acquire the function associated with the 9 symbol and game outcomes are determined by the 25 processor 102 on the basis of the positions of the standard symbols and on the function associated with the 9 symbol. It will be understood that a function may be applied to 30 all standard symbols corresponding to the nominated symbol, to corresponding standard symbols in one or more specific reels, to corresponding standard symbols in progressively increasing numbers of reels with successive games, or in any other predefined way. 35 330330_1 (GHMatters) P61326.AU.3 - 23 It will also be understood that more than one function may be assigned to one or more standard symbols in a game or progressively in successive games. For example, in a first game a first function may be allocated to one or 5 more symbols, and in a second successive game a second function may be assigned to one or more symbols. Furthermore, as with the first embodiment, it will be understood that a function may be allocatable to a symbol 10 in all games or functions may be allocatable to standard symbols only when the gaming system operates in a special game mode. The gaming system may be arranged to commence special game mode when predetermined game outcomes occur and special game mode may comprise one or more free games. 15 A specific example will now be described in relation to flow diagram 250 shown in Figure 7 which illustrates steps 252 to 272 of a method of gaming implemented by the gaming system according to the present embodiment. 20 In this example, five reels are provided with each reel having 9, 10, jack, queen, king, wild and cat symbols. The game operates such that during normal game mode no 25 additional function is applied to the symbols on the reels. Normal game mode continues until a predetermined game outcome occurs which triggers commencement of special game 30 mode. In this example, the predetermined outcome is scattered cats, although other predetermined outcomes which trigger special game mode are envisaged. When special game mode is triggered, the game controller 35 communicates to the player that special game mode is being played, in this example by displaying the words "Call of 3303306.1 (GHMatters) P61326 AU.3 - 24 the Wild". During special game mode, whenever a wild symbol appears in the visible display, another symbol is nominated to acquire a function, in this example a wild function, for the duration of the remaining free games. 5 The process of choosing which symbol is to acquire a wild function is carried out by the game controller, in particular by the processor in association with the random number generator 113. 10 For example, if during a free game a wild symbol is displayed, the game controller randomly selects a symbol other than a wild symbol, for example a queen, and all queens then acquire a wild function. The game outcome is then determined based on the displayed symbols and the 15 wild function assigned to the queen symbols. In the event of a win outcome a prize is paid to the player. During a subsequent free game, the wild function assigned to the queen symbols may be retained and, if a wild symbol 20 is again displayed when the reels stop, the game controller randomly selects a different symbol to acquire a function, for example a jack symbol. The game outcome is then determined based on the displayed symbols and the wild functions assigned to the jack and queen symbols. 25 In a further subsequent free game, if no wild symbols are displayed when the reels stop, the wild functions assigned to the jack and queen symbols are retained, but no further functions are assigned to the symbols. 30 After completion of the free games, normal mode resumes and the functions assigned to the jack and queen symbols are removed. 35 It will be understood that a function may be assigned to a symbol whenever symbols other than a wild symbol are 33033081 (GHMatters) P1328.AU.3 - 25 displayed on the gaming machine 40, 100. For example, display of a scatter symbol may trigger the game controller 101 to select a symbol to acquire a wild function or to acquire other functions such as a scatter 5 function. It will also be understood that a function may be assigned to a symbol based on other conditions occurring during special game mode. For example, a function may be 10 assigned to a symbol whenever a predetermined symbol is visible on a secondary display, is in a winning combination, is in a non-winning combination, is visible with another predetermined symbol, is visible when another predetermined symbol is not visible, or is not visible on 15 the game machine display 106. It will also be understood that instead of carrying out random selection of a symbol to acquire a function by the game machine 40, 100, the selection may be made by gaming 20 machine in a predefined sequence, by the player, by an external system or operator, or by another player. Modifications and variations as would be apparent to a skilled addressee are deemed to be within the scope of the 25 present invention. It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the 30 common general knowledge in the art, in Australia or any other country. In the claims of this application and in the description of the invention, except where the context requires 35 otherwise due to express language or necessary implication, the words "comprise" or variations such as 33033001 (GHMatters) P01325.AU.3 - 26 "comprises" or "comprising" are 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. 3303306.1 (GHMatters) P61326.AU.3

Claims (35)

1. A gaming system arranged to randomly display a plurality of symbols from a set of symbols, the gaming 5 system comprising: a function allocator arranged to allocate a function to at least one symbol selected from the set of symbols, wherein allocation of the function is based on a random selection of a special symbol from a plurality of special 10 symbols; and a game outcome generator arranged to determine a game outcome based on the displayed symbols and on the function allocated to the selected symbol; wherein the set of symbols comprises a plurality of 15 standard symbols with at least one of the standard symbols having the special symbol incorporated into the standard symbol; and wherein the function allocator is arranged to allocate a function to a standard symbol incorporating the 20 special symbol when the special symbol is separately displayed.

2. A gaming system as claimed in claim 1, wherein the function allocator is arranged to allocate a function to 25 at least one symbol selected from the plurality of displayed symbols.

3. A gaming system as claimed in any one of the preceding claims, wherein a special symbol is incorporated 30 into a standard symbol as a background symbol, a superimposed symbol, a double symbol, or by alternately displaying the standard symbol and the special symbol. 35 3303306_1 (GHMatters) P81326.AU.3 - 28

4. A gaming system as claimed in claim 3, wherein the incorporated special symbol is a number, allocation of a new function to a standard symbol is communicated to a player by displaying a number, and the function allocator 5 is arranged to allocate a function to all standard symbols which have a number which accords to a particular relationship based on the number.

5. A gaming system as claimed in claim 4, wherein the 10 relationship is that the displayed number is the same as, greater than, or less than the number incorporated into the symbol.

6. A gaming system as claimed in any one of claims 1 to 15 4, wherein allocation of a function to a standard symbol is communicated to a player by modifying the appearance of the symbol.

7. A gaming system as claimed in claim 6, wherein 20 allocation of a function to a standard symbol is communicated to a player by animating the symbol or by changing the colour of the symbol.

8. A gaming system as claimed in claim 4, wherein 25 allocation of a function to a standard symbol is communicated to a player by emphasising a displayed symbol.

9. A gaming system as claimed in claim 8, wherein a 30 displayed symbol is emphasised by illuminating the displayed symbol at an increased intensity relative to other displayed symbols, or by illuminating a selected symbol with light of a different colour to other displayed symbols. 35 330330 1 (GHMattem ) P8132G.AU.3 - 29

10. A gaming system as claimed in any one of the preceding claims, wherein a function is allocated to a selected symbol for one game. 5

11. A gaming system as claimed in any one of claims 1 to 9, wherein a function is allocated to a selected symbol for multiple successive games.

12. A gaming system as claimed in any one of the 10 preceding claims, wherein the gaming system is arranged to select a standard symbol and to allocate a function to the selected a standard symbol when a predefined trigger condition exists. 15

13. A gaming system as claimed in claim 12, wherein the predefined trigger condition is display of a predefined trigger symbol, or display of predefined graphical indicia. 20

14. A gaming system as claimed in claim 13, wherein the predefined trigger symbol is a function symbol and the gaming system is arranged to allocate the function associated with the function symbol to the selected standard symbol when the function symbol is displayed. 25

15. A gaming system as claimed in any one of the preceding claims, wherein the gaming system is operable in normal game mode and special game mode and the function allocator is arranged to allocate a function to a selected 30 standard symbol only when the gaming system is operating in special game mode. 35 330330_1 (GHMatters) P61326.AU.3 - 30

16. A gaming system as claimed in claim 15, wherein the gaming system is arranged to commence special game mode when a predetermined game outcome occurs. 5

17. A gaming system as claimed in any one of the preceding claims, wherein the gaming system is arranged to select a plurality of standard symbols and the function allocator is arranged to allocate a function to each selected standard symbol. 10

18. A gaming system as claimed in claim 17, wherein the symbols are associated with a plurality of reels and the function allocator is arranged to allocate a function to standard symbols appearing in one or more selected reels 15 only.

19. A gaming system as claimed in any one of the preceding claims, wherein the number of symbols selected progressively increases with successive games. 20

20. A gaming system as claimed in any one of the preceding claims, wherein the function allocated to a symbol is a wild function, a scatter function, a repeat win function, a multiplier function, a jackpot function or 25 a feature commencement function.

21. A gaming system as claimed in any one of the preceding claims, wherein the gaming system is implemented as a stand alone gaming machine or across a network. 30

22. A method of gaming comprising: providing a set of symbols comprising a plurality of standard symbols with at least one of the standard symbols 35 3303306_1 (GHMatters) P61 326 AU.3 - 31 having a special symbol incorporated into the standard symbol; randomly displaying a plurality of symbols from the set of symbols; 5 allocating a function to a selected symbol from the set of symbols based on a random selection of a special symbol from a plurality of special symbols; allocating a function to a symbol incorporating the special symbol when the special symbol is separately 10 displayed; and determining a game outcome based on the displayed symbols and on the function allocated to the selected symbol. 15

23. A method as claimed in claim 22, wherein the step of allocating a function to a selected standard symbol comprises allocating a function to at least one standard symbol selected from the plurality of displayed standard symbols. 20

24. A method as claimed in any one of claims 22 to 23, comprising incorporating a special symbol into a standard symbol as a background symbol, a superimposed symbol, a double symbol, or by alternately displaying the standard 25 symbol and the special symbol.

25. A method as claimed in claim 24, wherein the incorporated special symbol is a number, the method comprising communicating to a player allocation of a new 30 function to a standard symbol by displaying a number, and allocating a function to all standard symbols which incorporate a number which accords to a particular relationship. 35

330330.1 (GHMatters) P61326.AU.3 - 32

26. A method as claimed in claim 25, wherein the relationship is that the displayed number is the same as, greater than, or less than the number incorporated into the standard symbol. 5

27. A method as claimed in any one of claims 22 to 26, comprising communicating to a player allocation of a function to a standard symbol by modifying the appearance of the standard symbol. 10

28. A method as claimed in claim 27, wherein allocation of a function to a standard symbol is communicated to a player by animating the symbol or by changing the colour of the standard symbol. 15

29. A method as claimed in any one of claims 22 to 26, comprising communicating to a player allocation of a function to a standard symbol by emphasising a displayed standard symbol. 20

30. A method as claimed in claim 29, wherein a standard displayed symbol is emphasised by illuminating the displayed standard symbol at an increased intensity relative to other displayed standard symbols, or by 25 illuminating a selected standard symbol with light of a different colour to other displayed standard symbols.

31. A method as claimed in any one of claims 22 to 30, comprising allocating a function to a selected standard 30 symbol for one game.

32. A method as claimed in any one of claims 22 to 30, comprising allocating a function to a selected standard symbol for multiple successive games. 35 3303306_1 (GHMatters) P61320 AU.3 - 33

33. A method as claimed in any one of claims 22 to 32, comprising selecting a standard symbol and allocating a function to the selected standard symbol when a predefined trigger condition exists. 5

34. A method as claimed in claim 33, wherein the predefined trigger condition is display of a predefined trigger symbol, or display of predefined graphical indicia. 10 35. A method as claimed in claim 34, wherein the predefined trigger symbol is a function symbol and the method comprises allocating the function associated with the function symbol to the selected standard symbol when 15 the function symbol is displayed. 36. A method as claimed in any one of claims 22 to 35, comprising providing a normal game mode and a special game mode and allocating a function to a selected standard 20 symbol only during special game mode. 37. A method as claimed in claim 36, wherein special game mode commences when a predetermined game outcome occurs. 25 38. A method as claimed in any one of claims 22 to 37, comprising selecting a plurality of standard symbols and allocating a function to each selected standard symbol. 39. A method as claimed in any one of claims 22 to 38, 30 wherein the standard symbols are associated with a plurality of reels and the method comprises allocating a function to standard symbols appearing in one or more selected reels only.

35 330330_1 (GHMatters) P61328 AU.3 - 34 40. A method as claimed in any one of claims 22 to 39, wherein the number of standard symbols selected progressively increases with successive games. 5 41. A method as claimed in any one of claims 22 to 40, wherein the function is a wild function, a scatter function, a repeat win function, a multiplier function, a jackpot function or a feature commencement function. 10 42. A computer program arranged when loaded into a computer to instruct the computer to operate in accordance with a gaming system as claimed in any one of claims 1 to 21. 15 43. A computer readable medium having computer readable program code embodied therein for causing a computer to operate in accordance with a gaming system as claimed in any one of claims 1 to 21. 3303306_1 (GHMatter) PSI32SAU 3