Patent Publication Number: US-9886816-B2

Title: Method of gaming, a game controller and a gaming system with symbol groups sharing borders

Description:
RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 13/960,913, having a filing date of Aug. 7, 2013, expected to issue as U.S. Pat. No. 9,558,634 on Jan. 31, 2017, which claims priority to Australian Provisional Patent Application No. 2012903423 having an International filing date of Aug. 8, 2012, the contents of each of which are hereby incorporated herein by reference in their entirety. 
    
    
     FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     [Not Applicable] 
     MICROFICHE/COPYRIGHT REFERENCE 
     [Not Applicable] 
     BACKGROUND OF THE INVENTION 
     Many spinning reel games require a player to select how many “win lines” or “pay lines” lines they will play in each game. For example, a minimum of one line up to the maximum number of lines allowed by the game. Such win lines are typically formed by one symbol position from each reel, with the symbol positions being located relative to one another such that they form a line across the reels. 
     In another type of spinning reel game, players select a number of reels to play. Such games are marketed under the trade name “Reel Power” by Aristocrat Leisure Industries Pty Ltd. The selection of a reel means that all symbols displayed at symbol display positions corresponding to a selected reel can be used to form winning symbol combinations with symbols displayed at a designated, symbol display positions of unselected 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 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 a result for five reels and fifteen display positions there are 243 ways to win. 
     While such gaming systems provide players with enjoyment, a need exists for alternative gaming systems in order to maintain or increase player enjoyment. 
     BRIEF SUMMARY OF THE INVENTION 
     In a first aspect, the invention provides a method of gaming in a gaming system comprising: 
     selecting a plurality of symbols for display on a display of the gaming system at a plurality of display positions, each display position comprising a plurality of borders, each display position having a least one common border with at least two other display positions; 
     determining with the gaming system, whether there are one or more groups of at least three symbols corresponding to a designated winning symbol combination displayed at respective ones of a plurality of display positions linked in a contiguous group, the determination being based on the display positions sharing a common border; and 
     making any award corresponding to a determined group. 
     In an embodiment, for at least one designated symbol, there are a plurality of different numbers of the designated symbol in respective ones of a plurality of winning combinations. 
     In an embodiment, there are a plurality of different designated symbols which correspond to winning symbol combinations. 
     In an embodiment, at least one award comprises a prize. 
     In an embodiment, at least one award comprises additional game play from which at least one additional award may be made. 
     In an embodiment, for at least one designated symbol there are winning combinations for between 3 and 3+N symbols, wherein 3+N corresponds to a maximum number of designated symbols in a winning combination. 
     In an embodiment, there is at least one display position that has at least three common borders with respective ones of at least three other display positions and determining whether there are one or more groups includes checking whether a group of designated symbols is at least partly formed by symbols disposed at the at least one display position and the at least three other display positions with which the at least one display position shares a common border. 
     In an embodiment, there is at least one display position that has at least four common borders with respective ones of at least four other display positions and determining whether there are one or more groups includes checking whether a group of designated symbols is at least partly formed by symbols disposed at the at least one display position and the at least four other display positions with which the at least one display position shares a common border. 
     In an embodiment, symbols are selected independently for each display position. 
     In an embodiment, each symbol display positions corresponds to a reel of symbols from which the symbol is selected for display at the respective display position. 
     In a second aspect, the invention provides a game controller for a gaming system, the game controller arranged to: 
     select a plurality of symbols for display on a display of the gaming system at a plurality of display positions, each display position comprising a plurality of borders, each display position having a least one common border with at least two other display positions; 
     determine, whether there are one or more groups of at least three symbols corresponding to a designated winning symbol combination displayed at respective ones of a plurality of display positions linked in a contiguous group, the determination being based on the display positions sharing a common border; and 
     make any award corresponding to a determined group. 
     In an embodiment, for at least one designated symbol there are a plurality of different numbers of the designated symbol in respective ones of a plurality of winning combinations. 
     In an embodiment, there are a plurality of different designated symbols which correspond to winning symbol combinations. 
     In an embodiment, at least one award comprises a prize. 
     In an embodiment, at least one award comprises additional game play from which at least one additional award may be made. 
     In an embodiment, for at least one designated symbol there are winning combinations for between 3 and 3+N symbols, wherein 3+N corresponds to a maximum number of designated symbols in a winning combination. 
     In an embodiment, there is at least one display position that has at least three common borders with respective ones of at least three other display positions and the game controller determining whether there are one or more groups includes the game controller checking whether a group of designated symbols is at least partly formed by symbols disposed at the at least one display position and the at least three other display positions with which the at least one display position shares a common border. 
     In an embodiment, there is at least one display position that has at least four common borders with respective ones of at least four other display positions and the game controller determining whether there are one or more groups includes the game controller checking whether a group of designated symbols is at least partly formed by symbols disposed at the at least one display position and the at least four other display positions with which the at least one display position shares a common border. 
     In an embodiment, symbols are selected independently for each display position. 
     In an embodiment, each symbol display positions corresponds to a reel of symbols from which the symbol is selected for display at the respective display position. 
     In a third aspect, the invention provides a gaming system comprising: 
     a game play mechanism operable by a player to initiate a play of a game; 
     a display; 
     a symbol selector responsive to initiation of a play of the game and arranged to select a plurality of symbols for display on the display at a plurality of display positions, each display position comprising a plurality of borders, each display position having a least one common border with at least two other display positions; 
     a symbol group determiner arranged to determine whether there are one or more groups of at least three symbols corresponding to a designated winning symbol combination displayed at respective ones of a plurality of display positions linked in a contiguous group, the determination being based on the display positions sharing a common border; and 
     a prize awarder arranged to make any award corresponding to a determined group. 
     In an embodiment, at least one designated symbol there are a plurality of different numbers of the designated symbol in respective ones of a plurality of winning combinations. 
     In an embodiment, there are a plurality of different designated symbols which correspond to winning symbol combinations. 
     In an embodiment, at least one award comprises a prize. 
     In an embodiment, at least one award comprises additional game play from which at least one additional award may be made. 
     In an embodiment, for at least one designated symbol there are winning combinations for between 3 and 3+N symbols, wherein 3+N corresponds to a maximum number of designated symbols in a winning combination. 
     In an embodiment, there is at least one display position that has at least three common borders with respective ones of at least three other display positions and determining whether there are one or more groups includes checking whether a group of designated symbols is at least partly formed by symbols disposed at the at least one display position and the at least three other display positions with which the at least one display position shares a common border. 
     In an embodiment, there is at least one display position that has at least four common borders with respective ones of at least four other display positions and determining whether there are one or more groups includes checking whether a group of designated symbols is at least partly formed by symbols disposed at the at least one display position and the at least four other display positions with which the at least one display position shares a common border. 
     In an embodiment, symbols are selected independently for each display position. 
     In an embodiment, each symbol display positions corresponds to a reel of symbols from which the symbol is selected for display at the respective display position. 
     In a fourth aspect, the invention provides a gaming system comprising: 
     means for selecting a plurality of symbols for display on a display of the gaming system at a plurality of display positions, each display position comprising a plurality of borders, each display position having a least one common border with at least two other display positions; 
     means for determining with the gaming system, whether there are one or more groups of at least three symbols corresponding to a designated winning symbol combination displayed at respective ones of a plurality of display positions linked in a contiguous group, the determination being based on the display positions sharing a common border; and 
     means for making any award corresponding to a determined group. 
     In a fifth aspect, the invention provides an electronic gaming machine comprising a display mounted within a cabinet and a game controller mounted within the cabinet having a processor for executing game program code in response to a player operating at least one input device to initiate a play of the game, to implement a game in which the game controller selects a plurality of symbols for display on a display at a plurality of display positions, each display position comprising a plurality of borders, each display position having a least one common border with at least two other display positions, determines whether there are one or more groups of at least three symbols corresponding to a designated winning symbol combination displayed at respective ones of a plurality of display positions linked in a contiguous group, the determination being based on the display positions sharing a common border, and makes any award corresponding to a determined group. 
     In a sixth aspect, the invention provides computer program code which when executed implements the above method. 
     In a seventh aspect, the invention provides a tangible computer readable medium comprising the above program code. 
    
    
     
       BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS 
       An exemplary embodiment of the invention will now be described with reference to the accompanying drawings in which: 
         FIG. 1  is a block diagram of the core components of a gaming system; 
         FIG. 2  is a perspective view of a stand alone gaming machine; 
         FIG. 3  is a block diagram of the functional components of a gaming machine; 
         FIG. 4  is a schematic diagram of the functional components of a memory; 
         FIG. 5  is a schematic diagram of a network gaming system; 
         FIG. 6  is a further block diagram of a gaming system; 
         FIG. 7  is a flow chart of an embodiment; 
         FIGS. 8A to 8D  show examples of groups of designated symbol formed in accordance with embodiments of the invention; and 
         FIG. 9  shows an example of an arrangement of display positions. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to the drawings, there is shown a gaming system having a game controller arranged to implement a game where winning outcomes are awarded based on groups of designated symbols that are determined to be grouped together in a group of three or more designated symbols based on the symbols being displayed at symbol display positions having a common border. 
     Accordingly, in contrast to existing techniques for awarding a prize, the evaluation is based on the position of symbols relative to one another rather than the symbols being on a win line or in symbol display positions. In particular, it will be appreciated that at least one symbol in such a group of symbols will share at least two common borders with other symbol display positions having the designated symbol in order for a group of symbols to be formed. 
     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 wherein all or most components required for implementing the game are present in a player operable gaming machine. 
     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. 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 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. 
     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, 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. 
     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  60  as illustrated in  FIG. 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 outcomes. 
     Components of the player interface may vary from 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 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  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 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 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 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). 
     A gaming system in the form of a stand alone gaming machine  10  is illustrated in  FIG. 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  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 mechanism  24  which in this example includes a coin input chute  24 A and a bill collector  24 B. Other credit input mechanisms may also be employed, for example, a card reader for reading a smart card, debit card or credit 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 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 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. 
     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 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  FIG. 2  is in the form of a video 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, or the visible portion of an electromechanical device. The top box  26  may also include a display, for example a video display unit, which may be of the same type as the display  14 , or of a different type. 
       FIG. 3  shows a block diagram of operative components of a typical gaming machine which may be the same as or different to the gaming machine of  FIG. 2 . 
     The gaming machine  100  includes a game controller  101  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-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 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 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 random numbers includes pseudo-random numbers. 
     In the example shown in  FIG. 3 , a player interface  120  includes peripheral devices that communicate with the game controller  101  including one or more displays  106 , a touch 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 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 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 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. 
     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 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 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. 
       FIG. 4  shows a block diagram of the main components of an exemplary memory  103 . The memory  103  includes RAM  103 A, EPROM  103 B and a mass storage device  103 C. The RAM  103 A typically temporarily holds program files for execution by the processor  102  and related data. The EPROM  103 B may be a boot ROM device and/or may contain some system or game related code. The mass storage device  103 C 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  103 B or elsewhere. 
     It is also possible for the operative components of the gaming machine  100  to be distributed, for example input/output devices  106 , 107 , 108 , 109 , 110 , 111  to be provided remotely from the game controller  101 . 
       FIG. 5  shows a gaming system  200  in accordance with an 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  FIG. 5 , are connected to the network  201 . The gaming machines  202  provide a player operable interface and may be the same as the gaming machines  10 , 100  shown in  FIGS. 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  FIG. 5 , banks of one, three 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. 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. 
     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 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  206 A. Typically, if the gaming system enables players to participate in a Jackpot 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. 
     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 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 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 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 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 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, 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 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 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 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 
     Referring to  FIG. 6 , the player operates the game play mechanism  56  to specify a wager and initiates a play of the game. In  FIG. 6 , the processor  62  of game controller  60  is shown implementing a number of modules based on program 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. 
     These modules include the symbol selector  622  which operates in response to the player&#39;s operation of game play mechanism  56  to place a wager and initiate a play of the game and selects symbols from a set of symbols specified by symbol data  641  using random number generator  621 . The selected symbols are advised to the display controller  626  which causes them to be displayed on display  54  at a set of display positions. 
     One example of selecting symbols is for the symbol selector  622  to select symbols for display from a plurality of symbol sets corresponding to respective ones of a plurality of spinning reels. The symbol sets  641  can specify a sequence of symbols for each reel. In one embodiment, there is a reel for each display position in the array of display positions such that the symbol displayed at each symbol display position is selected independently of all other symbols by selecting a stopping position in the sequence for each reel. It is known to use a probability table stored in memory  64  to vary the odds of a particular stop position being selected. Other techniques can be used to control the odds of particular outcomes occurring to thereby control the return to player of the game. An advantage of employing reels is that the symbols can be displayed as spinning prior to the symbol being selected. Where this is not needed, the symbols could be drawn randomly from a set of symbols not having a sequence. In some embodiments, a reel may correspond to more than one symbol display position, for example a column of display positions. In such embodiments, the composition of the reels may be used to control the extent to which groups of symbols may be formed. 
       FIG. 7  is a flow chart  700  of the operation of the gaming system according to this embodiment, involving initiating play of the game (step  710 ), selecting symbols for display on the display positions (step  720 ), and determining whether the symbols contain a group based on symbols at positions sharing a common border  730  (step  730 ). If so, that is the symbol display positions have a group of designated symbols, processing continues at step  740  and an award is made. The award may be of credits, some other prize, or of additional game play. If the symbol display positions do not have a group of designated symbols, processing returns to step  710 . 
     Persons skilled in the art will appreciate that in some embodiments, there may be additional ways for a player to obtain an award, for example, if a designated number of scatter symbols appear within the array of display positions. 
     As indicated above, in one embodiment individual symbols are selected for display at each of the symbol display positions. In such an embodiment, there will be as many reels as symbol display positions. Accordingly, in the example shown in  FIG. 8 , there will be 25 separate reels defined by symbol data  641 . The symbol selector  622  selects the stopping position in each of the reels. The selected symbol is advised to the display controller  626  which controls spinning of the reels to show each of the reels stopping at the positions selected by the symbol selector using the random number generator  621  to show the selected symbols. 
     Once the symbols have been selected and displayed at symbol display positions, the symbol group determiner  625  checks the selected symbols to determine whether there are sufficient designated symbols formed into a group of three or more symbols based on the symbols being positioned at symbol display positions that share a common border. 
     Referring to  FIG. 8 , it will be seen that the common border is defined by the four edges of the symbol display position such that symbol display positions in a corner such as symbol display position  831 , have two common borders with neighboring symbol display positions, symbol display positions along an edge such as symbol display position  832  have three common borders with other symbol display positions and symbol display positions within the interior of the grid such as symbol display position  833  have four common borders. It will be appreciated that if the symbol display positions are a different shape, for example hexagon shaped or triangle shaped, they could have more or less common borders with other symbol display positions. 
     In the embodiment, the symbol group determiner  625 , includes a link checker  625 A that searches the symbol display positions until it finds symbol display positions linked by a common border that contain a designated symbol that can be used to form a winning combination. For example, Having located a pair of symbol display positions that are linked together by a common border and have the same designated symbol (being a symbol which corresponds to a winning combination), the link checker checks to see if either of those symbols are linked to a still further symbol of the same type—i.e. that there is a another designated symbol in a display position sharing a common border with either of the pair of symbol display positions and. The link checker uniquely identifies each combination of linked symbols such that a linked group of symbol display positions is only counted once. For example, referring to  FIG. 8A , the symbol display positions are arranged in an array of five columns  801  to  805  and five rows  811  to  815 . The link checker  625  searches row by row such that the first pair of designated symbols located are adventurer symbols  821 . Having located those adventurer symbols as being linked symbols, being part of a potential group, the link checker determines whether any of the symbol display positions surrounding these two symbols that have not been checked also contain a designated symbol. In this respect, wagon symbol  822  can substitute for any designated symbol in a winning combination. That is, the wagon symbol is a WILD symbol. Accordingly, the wagon symbol  822  completes a group of three designated adventurer symbols  821  which provide a winning combination. A similar process occurs with respect to the cowgirl symbols  823  shown in  FIG. 8A  such that once a group has been established, a second group cannot be established for the same cowgirl symbol. Again, the wagon symbol is connected to the cowgirl symbol and forms part of the group. Upon sufficient linked symbols being determined such that a group symbols is located, the prize awarder  624  awards a prize based on an amount specified in pay table  644 . If this award is an amount in credits, the award is added to the win meter of meters  645 . 
     Persons skilled in the art will appreciate that the rules for grouping symbols are specified as part of group rules  643  which are a sub-component of the game rules  642  implemented by the program code. 
     The game may also incorporate a feature game and to this end a trigger monitor  623  may monitor the selected symbols  622  to determine whether a trigger condition  624  is met for conducting of a feature game. The trigger event may be, a symbol combination in the game, occurrence of a specific symbol in the game, be caused by a designated series of events in the game, be caused by another connected system, based on turnover, based on a random evaluation, etc. 
     Referring to the above, it will be apparent that there will always be at least one symbol of a group of symbols that is at a display position that has a shared border with at least two other symbol display positions having the designated symbol including a WILD symbol that is acting as and substituting for a designated symbol in the group of symbols. Further, it will be appreciated that in a square grid array such as shown in  FIG. 8A , a symbol may be connected to up to four other symbols depending on the symbol display position at which the symbol is displayed. 
     Referring to  FIGS. 8B to 8D , there is shown an example of one way a feature game may be triggered. In one example, if the wagon symbol  822  as shown in  FIG. 8B  substitutes in a win, it stays on the display  800 B for a subsequent spin of the reels and acts as a “STICKY WILD”. That is, the symbol at that display position does not change while all the other symbols are changed by the reels being re-spun. If the wagon symbol substitutes for a character symbol (e.g. the adventurer or the cowgirl) the symbol animates to show that character getting ready for a trip. If the same wagon symbol substitutes for the same character three times in a row, the feature game is started. 
     As shown in  FIG. 8B , wagon symbol  822  is substituted in a win for cowgirl symbols  823 . In a second spin shown in  FIG. 8C , there is a new array of symbols with the exception of a wagon symbol  822  shown at the same position as it is a sticky wild. Two other cowgirl symbols as shown connected to the wagon symbol to form a group of three cowgirl symbols. Finally, as shown in  FIG. 8D , the wagon symbol  822  stays in the same position and two further cowgirl symbols  823  form part of the array of symbols  800 D. Accordingly, the feature game is started. 
     In the embodiment, the feature game consists of play where a player can reach one of three stops or a final destination. Challenges need to be completed to reach the next stop. After the first stop, the player receives an award which is ten times the amount bet, after the second, twenty times the amount bet and after the third stop, forty times the amount bet. If they reach their destination, they are paid an award of 100 times the amount bet. 
     At the start of the feature game, the player is awarded ten free games (i.e. the player will not need to invest additional credits at least until the ten free games are exhausted). During the feature game, each time the wagon symbol is spun up it results in an extra free game. As indicated above, the wagon symbol acts as a sticky WILD symbol and can be used to form winning combinations with designated symbols that form part of the set of winning combinations specified in the pay table, however, it will not participate in triggering the feature game. Each time the player reaches a stop, the player can chose to take the credit prize. Alternatively, if the player still has additional free games, the player can chose to give up the credit prize and try to reach the next stop or the final destination to obtain the larger win. If the player fails to reach any stop, they will not get the additional prize for reaching the next stop and will only take the wins from free games. 
     The player is always shown the optimum choice to make upon reaching a stop. At the beginning of the feature, a treasure map unfolds and this overlaps on the five by five reels. A few positions are marked on the reels/map. To complete the challenge, the player needs to obtain winning combinations that overlap each of the marked positions. Once the player reaches a destination, the player obtains a new treasure map. Accordingly, to get to the first stop, the player may need to cover two positions with a winning combination. A person skilled in the art will appreciate that there can be variations, for example, there may be specific winning combinations required in order to cover a position on the treasure map. 
     Persons skilled in the art will appreciate that there can be other arrangements of symbol display positions. Referring to  FIG. 9 , for example, an array  900  of diamond shaped symbol display positions can be provided in five columns, namely column  901  comprising symbols display positions  901 A,  901 B and  901 C, column  902  comprising symbol display positions  902 A,  902 B,  902 C and  902 D, column  903  comprising symbol display positions  903 A,  903 B and  903 C, column  904  comprising symbol display positions  904 A,  904 B,  904 C and  904 D, and column  905  comprising symbol display positions  905 A,  905 B and  905 C. 
     Persons skilled in the art will appreciate that typically, a win will result in some form of award being made such as an award of credits of additional game play from which further awards may be made. Such awards may never actually be physically received by a player. For example, many gaming systems provide a player with a double or nothing gamble feature, where the player can double or forfeit their credits before commencing another play of the game or cashing out. Further, as credits are fungible, once credits have been added to the credit meter it is not possible to distinguish between credits which exist because the player has input cash or the like and credits resulting from an award. 
     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 electronically, for example, digitally by a processor executing program code such as in the above description of a game controller. In this respect, in the above description certain steps are described as being carried out by a processor of a gaming system, it will be appreciated that such steps will often require a number of sub-steps to be carried out for the steps to be implemented electronically, for example due to hardware or programming limitations. For example, to carry out a step such as evaluating, determining or selecting, a processor may need to compute several values and compare those values. 
     As indicated above, the method may 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 device, e.g. an EEPROM, (for example, that could replace part of memory  103 ) or as a data signal (for example, by transmitting it from a server). Further different parts of the program code can be executed by different devices, for example in a client server relationship. Persons skilled in the art will appreciate that program code provides a series of instructions executable by the processor. 
     It will be understood to persons skilled in the art of the 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. 
     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. 
     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 “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.