Abstract: Network game system comprising: a center server is provided with means for storing object data received from each arcade system in a database, means for executing a competing game using data on the basis of each object data, and means for distributing the arcade ID, and player ID corresponding to the object data which won the race to each arcade server; the arcade server is provided with means for comparing the arcade ID received from the center server with a player's own arcade ID, and when they match each other, for transmitting the player ID to a game device within the arcade system; the game device is provided by comparing the player ID received from the arcade server with the player ID of an storage medium, and when they match each other, for judging that the player is the winner, and for writing bonus data into the storage medium.