A gaming machine comprising a external storage device provided with a first game region in which a first game file containing a program and data to realize a first game is stored and a second game region in which a second game file containing a program and data to realize a second game is stored, in which the first game and the second game are selectively played, and an extended device connected to the gaming machine as a physically separate device from the external storage device, wherein the extended device is provided with a determination device that determines whether a predetermined condition is met and a switching device that switches a game played in the gaming machine between the first game and the second game when the predetermined condition is met based on a determination result of the determination device.