Patent ID: 8057304

Claim:
A game machine using a recording medium demountable from a mounting unit of a main body of the game machine and capable of writing data, the game machine having a cooperative play mode for playing by cooperating with other players as cooperators, said game machine comprising: a team recognition means for reading the data of a first recording medium mounted on the mounting unit by a first player and reading the data of a second recording medium mounted on the mounting unit which is identical to the mounting unit as described above or another mounting unit by another player, checking whether a recording medium-specific ID of the other player is recorded in the first recording medium or whether the recording medium-specific ID of the first player is recorded in the second recording medium, and determining both to be a team when the recording medium-specific ID other than self's recording medium-specific ID has been recorded in at least one; and a data writing means for ascribing information expressing a play score during a progressing game or a result of competition by cooperative competition of teams recognized by the team recognition means to the recording medium-specific ID of the cooperator to record it in at least one recording medium of the first and the second recording media as team score recording data of the team.