Gaming Machine with Special Symbols that Change Other Symbols
In one embodiment, a base game played on a gaming machine may be a conventional 5×4 video reel-type game, where awards are granted for winning symbol combinations in the base game. If a bonus trigger has occurred, a number of free games are awarded. The symbols on the reel strips are then changed to at least include directional wild symbols, where wild symbols are associated with one of a variety of directions such as up, down, left-down-diagonally, right, etc. Obtaining such a directional wild symbol during a free game causes all symbols along that direction to be converted to a wild symbol. Overlapping wild symbols also act as award multipliers. Awards are then granted based on the symbol combinations and multipliers.
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This invention relates to gaming devices, such as video slot machines, and, in particular, to a bonus game played on a video slot machine.
BACKGROUNDCommon video slot machines randomly select and display an array of symbols, using virtual reels, then grant an award to a player based on the occurrence of certain symbol combinations across paylines. Typically, the game ends after the symbols are displayed and the award, if any, is granted. Although these types of games are highly successful, it is advantageous to provide bonus games that occur once in a while to make the game more interesting to a player. The bonus games have rules different from the normal game rules and typically provide higher average payouts to the player. A more interesting bonus game will generate increased revenue to the casino by increased play of the gaming machine.
SUMMARYThe invention may be implemented by a conventional-platform video slot machine that is suitably programmed. The invention can also be implemented by a home computer playing a slot machine type game, or by an internet game, or by a personal device connected to a wireless network.
Various embodiments are described. In one embodiment, a base game played on the gaming machine may be a conventional video reel-type game that displays a randomly selected array of symbols, where combinations of symbols across one or more paylines are evaluated by circuitry to determine an award to be granted. The array may be formed by five reels, where four symbols on each reel are displayed when the reels stop (a 5×4 array). Other arrays, such as 3×3, 3×4, 4×4, and 5×3, may be used. In one embodiment, there are horizontal and zig-zag paylines, and consecutive winning symbol combinations starting from the leftmost reel are needed to win an award. The player may bet above a minimum bet per game, where either the awards are directly multiplied by the amount bet and/or additional paylines are activated.
During play of the base game, the virtual reel strips contain special bonus trigger symbols. Displaying at least three of the bonus trigger symbols across a payline initiates a series of free bonus games. The number of bonus trigger symbols on a payline determines the number of free games. In another embodiment, the free bonus games may be initiated by another type of random event, such as a mystery trigger.
Once the bonus round is initiated, the machine's game processor changes the reel strips to include directional wild symbols and to delete the bonus trigger symbols. Each directional wild symbol has a specific direction associated with it such as, up, down, left-up-diagonally, left-down-diagonally, right-up-diagonally, right-down-diagonally, left, right, and possibly bidirectional. If a directional wild symbol appears in a free game, all symbols along the direction dictated by the wild symbol (i.e., up to the edge of the array) are turned into a wild symbol. If multiple directional wild symbols appear at the same time in a free game and their directions intersect to create an “overlapping” wild symbol, that overlapped wild symbol then multiplies any award achieved using that wild symbol in a combination by the number of overlapped wild symbols it represents. For example, if there were three overlapping wild symbols at one symbol position, the multiplier would be 3×. If a normal wild symbol (i.e., not a special directional wild symbol) were overlapped, that wild symbol would also become a multiplier. The multiplier similarly applies if a directional wild symbol were overlapped due to the operation of another directional wild symbol.
After the bonus round is initiated, the free games are then played automatically or the player may need to press a spin button to start the spinning of the five reels. The reels then randomly stop to display a new set of symbols.
In each free game, any awards for a winning combination of scatter symbols are paid instantly, prior to changing any symbols to a wild symbol, since a scatter symbol possesses a scatter quality that would be lost had the scatter symbol been changed to a wild symbol.
If any directional wild symbols appear, all symbols in the designated direction are then converted to wild symbols. Overlapping wild symbols are also multipliers. Any awards for winning symbol combinations are then paid to the player. Such winning combinations include combinations with or without the wild symbols. In one embodiment, only combinations involving consecutive symbols starting from the leftmost reel can be a winning combination during the free games.
If there are multiple winning combinations in a single payline, only the highest is paid.
In one embodiment, the free games are played with the same bet and number of activated paylines that applied to the paid game that resulted in the bonus round trigger. The amount of the bet determines the award for each winning combination.
After all the free games are played, the player must wager credits to play the base game again.
Other variations are described herein. In one embodiment, a first round of awards is granted prior to symbols being converted to wild symbols. In another embodiment, the directional wild symbols are part of the base game. In another embodiment, the direction associated with a directional wild symbol is selected pseudo-randomly prior to the directional wild symbol affecting other symbols. In another embodiment, the direction associated with a directional wild symbol need not be a straight line and may be a zig-zag line or may dynamically change depending on other symbols in the path or the direction may be “reflected” by an outer boundary of the display.
Although the invention can typically be implemented by installing a software program in most types of modern video gaming machines, one particular gaming machine platform will be described in detail.
A top display 14 is also a video screen that may be used to display aspects of the bonus game, described below.
A coin slot 16 accepts coins or tokens in one or more denominations to generate credits within the machine 10 for playing games. An input slot 18 accepts various denominations of banknotes or machine-readable tickets, and may output printed tickets for use in cashless gaming. A coin tray 20 receives coins or tokens from a hopper upon a win or upon the player cashing out. Player control buttons 22 include any buttons needed for the play of the games offered by the machine 10 including, for example, a bet button, a max-bet button, a spin reels button, a cash-out button, and any other suitable button. Pressing the bet button multiple times multiplies the bet. Buttons 22 may be replaced by a touch screen with virtual buttons.
Each bet deducts credits from a credit meter 24 that stores the accumulated credits from wins and the insertion of money. If the player cashes out, all the credits in the credit meter 24 are paid to the player. A game win meter 26 identifies the amount won for the present game.
Modern gaming machines are connected within a network for remote monitoring of the machines. The game controller board 30 transmits and receives signals to and from a network 56 via a communications board 58. The network 56 includes servers and other devices that monitor the linked gaming machines 10 and GM1-GM-N.
In the below scenario, a software program for playing the base game and bonus game is installed in the gaming machine 10.
The below description of the game refers to steps in the flowchart of
In step 64 of
In
In step 66 of
In step 68, the gaming machine 10 determines the number of free games awarded by the BONUS symbol combination. In one embodiment, 3 BONUS symbols grant 10 free games, 4 BONUS symbols grant 15 free games, and 5 BONUS symbols grant 20 free games.
In step 70, after the bonus round is triggered, the game processor on board 30 (
In one embodiment, only the middle three reels (2, 3, and 4) contain a directional wild symbol. The directional wild symbol may be any image and need not identify its associated direction, since the conversion of symbols to wild symbols after a spin will convey the direction to the player.
The bonus trigger symbols are deleted from the reel strips during the bonus round. Various other symbols on the reels strips may be changed in the bonus games. In other embodiments, the bonus trigger symbols remain on the reel strips during the bonus round so that the bonus round may be “re-triggered”.
The instructions and rules for the free games may be displayed on the upper or lower display screens 12, 14.
In step 72, the gaming machine processor initiates the first free spin or the player initiates the spin by pressing a spin reels button. The reels then randomly stop.
In step 74, any scatter symbol combination wins are paid to the player prior to any conversion of symbols to wild symbols, since scatter symbols possess a scatter quality that would be extinguished had a scatter symbol been converted to a wild symbol. In
In step 76, illustrated in
As seen in the example of
In step 82, it is determined whether there are any more free games. If not, the bonus round ends, and the player plays the normal base games by wagering credits.
If there are free games remaining, the process loops to step 72.
In
While the previous embodiments converted symbols to wild symbols prior to determining awards for winning combinations (except for scatter combinations), awards may be increased by granting awards prior to and after the wild symbol conversion. In one embodiment, the award after the conversion is only paid for combinations that include a newly converted wild symbol. In one embodiment, granting such awards prior to the symbol conversion may only be for special symbol combinations.
Instead of each directional wild symbol having a predetermined direction associated with it, its direction may be associated only after it is displayed, such as by a weighted random selection.
In some cases, it may not be appropriated to convert a symbol into a wild symbol, such as if the original symbol represented an instant award or a certain high value symbol or a multiplier.
In another embodiment, the direction associated with a directional wild symbol may represent a zig-zag line or represent a dynamic direction that zig-zags as a result of the position of the directional wild symbol. For example, if a directional wild symbol on a rightmost reel is associated with a right-down-diagonal direction, the line of conversion may emulate a reflection of the line off the right side of the display boundary.
In another embodiment, the direction changes, such as emulating a reflection, when the original direction intersects a special symbol (e.g., another wild symbol). In this way, more symbols will likely be converted.
Therefore, a directional wild symbol may be associated with an initial direction that may ultimately change due to the wild symbol's position in the array and due to other symbols in the array.
In one embodiment, the free games are played with the same bet and number of activated paylines that applied to the paid game that resulted in the bonus round trigger. The amount of the bet determines the award for each winning combination.
Although the game involving the directional wild symbols has been described as a bonus game, the game involving the directional wild symbols may be the base game, where the directional wild symbols are always active (no special triggers) and the reels strips do not change.
In one embodiment, any symbol converted into a wild symbol need not change the image of that symbol, although changing the image is preferred to better illustrate the operation to the player.
Although, in the examples, the directional symbol is a wild symbol that represents all symbols (except a scatter function), the directional symbol can instead be any other high value symbol. In one variation, the directional symbol causes all symbols in the designated direction to just be multipliers of any award using such a symbol without the symbol itself being converted to another type of symbol.
Although a stand-alone gaming machine has been described, the term “gaming machine” may also apply to a programmed home computer, or any other type of computer, including a cell phone, programmed to carry out the present bonus game.
The term “random” used herein refers to pure random as well as pseudo-random.
While particular embodiments of the present invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from this invention in its broader aspects and, therefore, the appended claims are to encompass within their scope all such changes and modifications as fall within the true spirit and scope of this invention. For example, the bonus trigger may be any symbols combination and only award one free game. Any of the features described herein may be combined into a game.
Claims
1. A method performed by a video gaming device, the method comprising:
- a. spinning and stopping a plurality of virtual reels, having symbols, in a game to generate an array of symbols, the symbols including at least one directional wild symbol, each directional wild symbol representing a plurality of other symbols for use in making symbol combinations, each directional wild symbol being associated with at least one direction, the at least one direction including left, right, and diagonal, wherein an appearance of a directional wild symbol in an array of symbols causes one or more symbols along the at least one direction associated with the directional wild symbol to act as a wild symbol;
- b. if a directional wild symbol appears in an array of symbols, then causing one or more symbols along the at least one direction associated with that directional wild symbol to act as a wild symbol; and
- c. achieving awards based on at least winning combinations of symbols, including combinations using the directional wild symbols and other symbols that have been caused to act as wild symbols by operation of the directional wild symbols
2. The method of claim 1 wherein, in a base game using the plurality of virtual reels, there are no directional wild symbols, the method further comprising:
- determining whether a bonus round trigger has occurred during the base game;
- if a bonus round trigger has occurred, then performing the method comprising: adding at least one directional wild symbol to the plurality of virtual reels; granting the player one or more free bonus spins of the virtual reels, in a bonus round, to achieve arrays of randomly selected symbols with each spin; carrying out steps b and c; and after all free games have been played, terminating the bonus round.
3. The method of claim 1 wherein the direction associated with each directional wild symbol is predetermined and fixed.
4. The method of claim 1 wherein the direction associated with each directional wild symbol is pseudo-randomly selected prior to a directional wild symbol being used to cause one or more symbols along the at least one direction to act as a wild symbol.
5. The method of claim 1 wherein, if multiple directional wild symbols appear in the array, and a particular symbol is at an intersection of the directions associated with the multiple directional wild symbols, then causing that particular symbol to be a wild symbol and a multiplier of any award involving that wild symbol in a winning combination of symbols.
6. The method of claim 5 wherein a value of the multiplier is increased as more directions intersect the particular symbol by operation of directional wild symbols.
7. The method of claim 1 wherein the at least one direction includes up, down, left, right, up-right-diagonal, left-right-diagonal, up-left-diagonal, and down-left-diagonal.
8. The method of claim 1 wherein, if a directional wild symbol appears in an array of symbols, then causing all symbols along the direction associated with that directional wild symbol to act as a wild symbol.
9. The method of claim 1 wherein the direction associated with a directional wild symbol is a straight line direction that is either horizontal, vertical, or diagonal with respect to the array.
10. The method of claim 1 wherein the direction associated with a directional symbol includes zig-zag directions.
11. The method of claim 10 wherein, if a line along a direction associated with a directional wild symbol intersects a special symbol, the line changes direction, causing symbols along the line to act as a wild symbol.
12. The method of claim 10 wherein, if a line along a direction associated with a directional wild symbol reaches an outer boundary of the array, the line changes direction, causing symbols along the line to act as a wild symbol.
13. The method of claim 1 wherein, if a directional wild symbol appears in an array of symbols, then causing all symbols along the direction associated with that directional wild symbol to act as a wild symbol except for certain special symbols.
14. The method of claim 1 further comprising achieving awards based on winning combinations of symbols prior to any symbol being affected by any directional wild symbol, then achieving awards based on winning combinations of symbols including combinations using symbols that have been caused to act as wild symbols by operation of any directional wild symbols.
15. A gaming machine comprising:
- a display screen: and
- a processing system programmed to carry out the following method: a. spinning and stopping a plurality of virtual reels, having symbols, in a game to generate an array of symbols, the symbols including at least one directional wild symbol, each directional wild symbol representing a plurality of other symbols for use in making symbol combinations, each directional wild symbol being associated with at least one direction, the at least one direction including left, right, and diagonal, wherein an appearance of a directional wild symbol in an array of symbols causes one or more symbols along the at least one direction associated with the directional wild symbol to act as a wild symbol; b. if a directional wild symbol appears in an array of symbols, then causing one or more symbols along the at least one direction associated with that directional wild symbol to act as a wild symbol; and c. achieving awards based on at least winning combinations of symbols, including combinations using the directional wild symbols and other symbols that have been caused to act as wild symbols by operation of the directional wild symbols
16. The machine of claim 15 wherein the processing system is further programmed so that the direction associated with each directional wild symbol is predetermined and fixed.
17. The machine of claim 15 wherein the processing system is further programmed so that the direction associated with each directional wild symbol is pseudo-randomly selected prior to a directional wild symbol being used to cause one or more symbols along the at least one direction to act as a wild symbol.
18. The machine of claim 15 wherein the processing system is further programmed so that the at least one direction includes up, down, left, right, up-right-diagonal, left-right-diagonal, up-left-diagonal, and down-left-diagonal.
19. The machine of claim 15 wherein the processing system is further programmed so that, if a directional wild symbol appears in an array of symbols, then all symbols along the direction associated with that directional wild symbol are caused to act as a wild symbol.
20. The machine of claim 15 wherein the processing system is further programmed so that the direction associated with a directional wild symbol is a straight line direction that is either horizontal, vertical, or diagonal with respect to the array.
21. The machine of claim 15 wherein the processing system is further programmed so that the direction associated with a directional symbol includes zig-zag directions.
22. The machine of claim 15 wherein the processing system is further programmed so that, if a directional wild symbol appears in an array of symbols, then all symbols along the direction associated with that directional wild symbol are caused to act as a wild symbol except for certain special symbols.
Type: Application
Filed: Nov 6, 2009
Publication Date: May 12, 2011
Applicant: SPIELO MANUFACTURING ULC (Moncton)
Inventors: Francois R. Leger (Dieppe), Wesley S. Davis (Notre Dame)
Application Number: 12/614,262
International Classification: A63F 9/24 (20060101);