A game system, wherein a plurality of game devices (1, 1, ...) are connected to a master game station (7) via a communication network (3) to allow communication game applications to be executed between individual game devices (1, 1, ...) via the master game station (7). In addition, the game system provides to individual game devices (1, 1, ...) personal information processing means (10, 10, ...)to enable personal information exchange between players during game application execution between individual game devices (1, 1, ...), thereby allowing players to exchange personal information in theform of calling cards with opponents via personal information processing means (10, 10, ...) at the starts or ends of games.