Patent ID: 8162733
Filing Date: 2012-04-24
Classification: G07F

Abstract:
1. A slot machine comprising: a plurality of re-trigger symbols; a plurality kinds of symbols including the re-trigger symbols; a symbol group comprising the symbols; a symbol matrix frame where one of the symbols is arranged on each point which is formed by crossing a plurality of horizontal lines and a plurality of vertical columns; a display device for displaying the symbol matrix frame; a unit game in which a prize is awarded to a player based on the symbol displayed in the symbol matrix frame on the display device; a base game comprising each of the unit games; a free game in which the unit game is repeated for a first number of times; a chance game which is executed for determining whether or not the free game is executed again; a processor programmed, for executing the free game, to execute each of processes from the process of (1) below to the process of (17) below: