To keep a player from losing a feeling of expectation for a high probability state after the end of a specific game state.

A game may be in a probability variable state even when a probability variable notification is not made, and a presentation mode of a presentation carried out over a plurality of times of variable displays after the end of a jackpot game state becomes a first probability variable presentation mode. Further when presentation is carried out in such a first probability variable presentation mode, a shift to a second probability variable presentation mode is made at different rates based on whether control into a high probability state is performed (S404-S406).