To increase excitement and enjoyment of a game by an advance notice performance reporting in advance the possibility that a specific display results.

The game machine permits a performance using a cherry symbol different from the same in an ordinary performance mode to be carried out before or/and after materialization of readiness to win. Depending on the timing of carrying out a cherry symbol performance and whether the current game condition is an ordinary condition, a reduced time condition or a probability variation condition, the reliability of materialization of a jackpot and expectation of a probability variation vary. The arrangement permits a player's feeling of hopefulness to vary in accordance with the status of progress of the game and increases the excitement and enjoyment of the game.