Casino game with peripheral ring of scatter symbols around center reels
A gaming machine displays a set of virtual center reels, creating an M×N array of symbols, and an independent set of virtual peripheral reels surrounding the M×N array. The peripheral reels are part of a secondary game, and each peripheral reel displays only one symbol position. The center reels contain at least one trigger symbol for trigging the secondary game. Each of the reels spins and randomly stops. Awards are granted for winning symbol combinations on the center reels. If the trigger symbol is displayed in the M×N array, or other trigger condition exists, a bonus award is granted for winning symbol combinations on the peripheral reels. The bonus award may be based on the number of peripheral symbols that match the displayed trigger symbol or may be based on other criteria. In one embodiment, the trigger symbols are only on one of the center reels.
1. A method performed by a gaming device, the gaming device including a processing system, the method comprising:
providing a set of motor driven center reels;
providing one or more video screens for displaying a set of secondary reels that at least partially surrounds the center reels;
the processing system spinning and randomly stopping the set of center reels and the set of secondary reels, the secondary reels being configured to randomly display peripheral symbols, including scatter symbols, during a secondary game, wherein the scatter symbols displayed on the secondary reels are combinable only with each other in the secondary game to form winning symbol combinations of the scatter symbols in the secondary game,
the center reels having at least one trigger symbol for triggering the secondary game involving the secondary reels, each of the secondary reels being independently spun and stopped and each of the secondary reels displaying at most one peripheral symbol, the center reels displaying an M×N array of symbols, where M and N are each greater than one;
determining, under control of the processing system, any winning symbol combinations in the M×N array of symbols;
detecting, under control of the processing system, that there is a trigger condition for playing the secondary game, the trigger condition being based on the display of one or more of the at least one trigger symbol;
determining, under control of the processing system, any winning symbol combinations by the scatter symbols displayed on the secondary reels, such winning symbol combinations by the scatter symbols not including any symbols displayed by the center reels; and
granting, under control of the processing system, the player an award for any winning symbol combinations in the M×N array of symbols and a bonus award for any winning symbol combinations by only the peripheral symbols displayed on the secondary reels.
2. The method of claim 1 wherein the peripheral symbols comprise multiple types of peripheral symbols.
3. The method of claim 2 wherein the at least one trigger symbol comprises at least one trigger symbol for each type of peripheral symbol.
4. The method of claim 3 wherein a display of one type of trigger symbol on the center reels triggers play of the secondary game, the method further comprising granting an award for the secondary game based on a number of peripheral symbols displayed corresponding to the type of trigger symbol displayed on the center reels.
5. The method of claim 4 where the at least one trigger symbol is only on a single one of the center reels such that a maximum of one trigger symbol can be displayed in the M×N array.
6. The method of claim 1 wherein multiple center reels contain a trigger symbol, wherein the trigger condition comprises a display in the M×N array of a particular combination of trigger symbols.
7. The method of claim 6 wherein there are a plurality of types of peripheral symbols on the secondary reels.
8. The method of claim 1 wherein the peripheral reels contain only one type of peripheral symbol and blank reel positions.
9. The method of claim 1 wherein all possible stop positions of the secondary reels contain a peripheral symbol that may be used to create the winning symbol combinations.
10. The method of claim 1 wherein the at least one trigger symbol on the center reels acts as a wild symbol for the M×N array.
11. The method of claim 1 wherein the step of stopping the center reels and the secondary reels comprises stopping the center reels prior to stopping the secondary reels, and then sequentially stopping the secondary reels.
12. The method of claim 1 wherein the secondary reels completely surround the M×N array.
13. The method of claim 1 wherein there are five center reels each displaying three symbols, and there are 20 secondary reels, each secondary reel displaying at most one peripheral symbol.
14. The method of claim 1 wherein the gaming device is a computing device communicating with a server via the Internet.
15. The method of claim 1 further comprising the processing system detecting a special additional bet to activate the secondary game prior to the spinning of the center reels and secondary reels.
16. The method of claim 1 wherein the award for any winning symbol combinations by the peripheral symbols displayed on the secondary reels is at least one of a monetary award, an award multiplier, or a bonus game.
17. The method of claim 1 wherein multiple trigger symbols in the M×N array increase any award to the player based on winning combinations of symbols on the secondary reels.
18. The method of claim 1 wherein the award for any winning symbol combinations by peripheral symbols displayed on the secondary reels is based on a number of peripheral symbols of a particular type.
19. A gaming device comprising:
a set of motor driven center reels;
one or more video screens for displaying a set of secondary reels that at least partially surrounds the center reels;
at least one computer programmed to carry out the following steps:
spinning and randomly stopping the set of center reels and the set of secondary reels, the secondary reels being configured to randomly display peripheral symbols, including scatter symbols, during a secondary game, wherein the scatter symbols displayed on the secondary reels in the secondary game are combinable only with each other to form winning symbol combinations of the scatter symbols in the secondary game,
the center reels having at least one trigger symbol for triggering the secondary game involving the secondary reels, each of the secondary reels being independently spun and stopped and each of the secondary reels displaying at most one peripheral symbol, the center reels displaying an M×N array of symbols, where M and N are each greater than one;
determining any winning symbol combinations in the M×N array of symbols;
detecting that there is a trigger condition for playing the secondary game, the trigger condition being based on the display of one or more of the at least one trigger symbol;
determining any winning symbol combinations by the scatter symbols displayed on the secondary reels, such winning symbols combinations by the scatter symbols not including any symbols displayed by the center reels; and
granting the player an award for any winning symbol combinations in the M×N array of symbols and a bonus award for any winning symbol combinations by only the peripheral symbols displayed on the secondary reels.
20. The device of claim 19 wherein the secondary reels completely surround the M×N array.