To provide a game system equipped with such a constitution that the game system and a network auction system are combined, and the results in respective systems are related with each other.

A plurality of computers are connected through a communication network, and a game program is performed by the computers. In addition, a situation wherein virtual products which are handled in the game are traded between a plurality of users who operate the computers is realized by utilizing the network auction (S18 to S36). Also, the game program is performed by utilizing the virtual products which are supplied by an auction realizing means (S12), and the virtual products which are utilized for the game program are traded by the network auction for the constitution of this game system.