| 摘要 |
PROBLEM TO BE SOLVED: To sustain a player's sense of expectancy for a result of a lottery while preventing the player from sensing the result of the lottery when presentation images are displayed through a plurality of steps, and to prevent increase in cost of manufacture. SOLUTION: A step selecting lottery is executed with the selection rate according to the kind of a variation pattern when a jackpot is won. When the step selection lottery is terminated, a presentation image selecting lottery is executed by using a first presentation lottery table for the step selected in the step selecting lottery. For other steps not selected by the step selecting lottery, the presentation image selecting lottery is executed by using a second presentation lottery table. COPYRIGHT: (C)2010,JPO&INPIT
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