GAME MACHINE

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PROBLEM TO BE SOLVED : To improve expectations felt by a player who desires to enjoy specified performances while maintaining a rare value in the specified performances. SOLUTION : The subject game machine such as a Pachinko machine or an arrange ball machine has a specified performance appearance probability variation means 4 which realizes the specified performances by changing the appearance probability. The specified performance appearance probability variation means 4 changes the appearance probability Pd (for example, performance by making character pattern 9a appear on a display device 9). This can improve the expectations felt by the player who desires to enjoy the specified performances and enables the maintenance of the rare value in the specified performances.