To provide a game with contents suitable for each user.

The game system comprises a user information recording means 33 of recording plural pieces of user information, an input means 22 of inputting user discrimination information, an extraction means 32 of extracting user information from the user information recorded in the user information recording means based on the user discrimination information, a setting means 23 for changing and setting a game environment based on the user extracted from the extraction means, and a game execution means 21 for executing a game under the game environment set by the setting means.