To provide a game system suitable to effectively inform a user of an operation situation of a game device.

In a server device 220 provided in the game system, a registration request receiving part 221 receives a request for start registration and a request for finish registration transmitted from the game device. A storage part 222 associates the start time and the finish time of a game with respect to the received request for start registration and request for finish registration with the identifier of the game device, and respectively stores them. An operation situation request receiving part 223 receives a request for an operation situation transmitted from a terminal device. When the request for the operation situation is received, an acquisition part 224 acquires the operation status of each game device or the operation situations of the entire of two or more game devices from the difference between the stored finish time and the previous start time after the finish time, associated with each identifier of the game device. An operation-situation response transmission part 225 transmits an operation-situation response which designates the acquired operation situation, to a terminal device having transmitted the request for the operation situation.