To effectively preserve a history of a good status from among a game history.

For a period game history, followed by determination (operation) for issuing a two-dimensional code open to the public, a two-dimensional code open to the public is generated based on the most dominant period game history as a result of comparison of superiority or inferiority of the period game history totaled within the previous specific totaling period. Further, the code is outputted such that a player can obtain the code, thus allowing the player to obtain information on the game history. Therefore, the player can at least obtain the most dominant period game history totaled within the previous specific totaling period by the operation for issuing a two-dimensional code open to the public even if a poor status results through a good status in a game.