Gaming machine and method of providing a game

Abstract

The present invention is a gaming machine that realizes an exciting game typically in a slot machine format. The gaming machine includes a controller and a display. The controller runs games, accepts a bet of credit and returns a certain amount of credit as a payout. This payout amount is determined by multiplying a winning amount and a certain value of multiplier. The controller runs a primary game and a secondary game. When the secondary game is triggered, the controller displays a choice for acceptance or decline of an extra bet to the player on the display. When the player chooses to accept the extra bet, the value of multiplier is set larger than a default value of multiplier. After the value of multiplier is changed, the changed value of multiplier is shown on the display in a different area where the symbols are shown during the secondary game.

1 . A gaming machine comprising:
 a controller, which accepts a bet of credit and returns a certain amount of credit as a payout determined by multiplying a winning amount and a certain value of multiplier, and which runs a primary game and a secondary game;   wherein the value of multiplier is set larger than a default value of multiplier in the secondary game when the controller accepts a bet of credit before starting the secondary game.   
     
     
         2 . The gaming machine according to  claim 1 , wherein the value of multiplier is set larger than the default value of multiplier in the secondary game when the controller accepts the bet of credit before starting the secondary game and after the primary game. 
     
     
         3 . The gaming machine according to  claim 1 , wherein the secondary game is a free game when the value of multiplier is a default value. 
     
     
         4 . The gaming machine according to  claim 1 , wherein the bet of credit before starting the secondary game is an extra bet to increase the value of multiplier. 
     
     
         5 . The gaming machine according to  claim 4 , further comprising:
 a display;   wherein the controller displays a choice for acceptance or decline of the extra bet to a player on the display,   and wherein the controller sets the value of multiplier used in the secondary game based on the player's choice.   
     
     
         6 . The gaming machine according to  claim 5 , further comprising:
 buttons or a touch panel for receiving the player's choice of the acceptance or decline of the extra bet.   
     
     
         7 . The gaming machine according to  claim 5 , wherein the controller changes the value of multiplier offered to the player at random. 
     
     
         8 . The gaming machine according to  claim 4 , wherein the controller offers a selection of plural different amounts of the extra bet, and sets the value of multiplier used in the secondary game based on the selected amount of the extra bet. 
     
     
         9 . The gaming machine according to  claim 1 , further comprising:
 a reel, on which symbols are aligned, and   an overlay panel that modifies appearances of the symbols on the reel.   
     
     
         10 . The gaming machine according to  claim 1 , wherein the default value of multiplier is a value of multiplier in the primary game. 
     
     
         11 . The gaming machine according to  claim 1 , further comprising:
 a display, which displays a reel having a multiplier symbol;   wherein the multiplier symbol indicates a numeral; and   wherein the default value of multiplier is a value of the numeral when the multiplier symbol is shown in the display.   
     
     
         12 . The gaming machine according to  claim 11 , wherein when the value of multiplier is different from the default value of multiplier, the value of multiplier is shown on the display in a different area where the reels are shown. 
     
     
         13 . A gaming machine comprising:
 a controller, which accepts a bet of credit and returns a certain amount of credit as a payout determined by multiplying a winning amount and a certain value of multiplier, and which runs a primary game and a secondary game;   wherein the controller sets the value of multiplier used for the secondary game based on the bet amount in the primary game, and   wherein the value of multiplier is increased in the secondary game when the controller accepts an additional bet before starting the secondary game.   
     
     
         14 . The gaming machine according to  claim 13 , wherein the controller sets the value of multiplier used in the secondary game based on the bet amount in a primary game that triggered the secondary game. 
     
     
         15 . A gaming machine comprising:
 a controller, which accepts a bet of credit and returns a certain amount of credit as a payout determined by multiplying a winning amount and a certain value of multiplier, and which runs a primary game and a secondary game, and   a display that shows a reel having a specific type of symbol;   wherein the controller offers a choice for acceptance or decline of an extra bet to a player with a value of multiplier used in the secondary game, and   wherein the controller changes the value of multiplier offered to the player based on the specific type of symbol shown in the display in the primary game.   
     
     
         16 . The gaming machine according to  claim 15 , wherein the specific type of symbol is a symbol that triggers the secondary game. 
     
     
         17 . The gaming machine according to  claim 15 , wherein the reel has a plurality of a specific type of symbols; and
 wherein the value of multiplier offered to the player is changed based on a number of the specific type of symbols shown in the display.   
     
     
         18 . The gaming machine according to  claim 15 , wherein the reel has a plurality of specific types of symbols; and
 wherein the value of multiplier offered to the player is varied based on a type of a specific type of symbol shown in the display.   
     
     
         19 . A gaming machine comprising:
 a controller, which accepts a bet of credit and returns a certain amount of credit as a payout determined by multiplying a winning amount and a certain value of multiplier, and which runs a primary game and a secondary game, and   a display that shows a reel having symbols;   wherein the controller sets the value of multiplier used in the secondary game at random, and   wherein the value of multiplier randomly set is increased in the secondary game when the controller accepts an additional bet before starting the secondary game.   
     
     
         20 . The gaming machine according to  claim 19 , wherein the controller sets the value of multiplier used in the secondary game based on a random number generated before starting the secondary game. 
     
     
         21 . The gaming machine according to  claim 20 , wherein the controller offers a choice for acceptance or decline of the additional bet to a player before starting the secondary game,
 and wherein the controller increases the randomly set value of multiplier used in the secondary game based on the choice.   
     
     
         22 . A method of providing a game comprising the steps of:
 running a primary game,   offering a choice for acceptance or decline of a bet of credit after the primary game;   changing a value of multiplier according to the choice; and   running a secondary game, using the value of multiplier.   
     
     
         23 . The method of providing a game according to  claim 22 , wherein the value of multiplier after changing is within ten times of a default value of multiplier.