A terminal device in an network game system which comprises terminal devices that accept operations by players and a game server device to which a plurality of the terminal devices are connected so as to be capable of communication through communication circuits, and which conducts a network game played by a prescribed number of players in a common game space,
- said terminal device comprising a game progress management device to which a prescribed number of the terminal devices that receive operations from the players are connected through the communication circuits so as to be capable of mutual communication of operation signals necessary for proceeding with a game and whereby a progress of the network game that is conducted in the common game space is managed and the network game is continued in simulated fashion if a fault occurs in the communication circuits, said game progress management device including:
- abnormality monitoring means that detects a disconnected circuit in which failure of communication has occurred from the communication circuits of the prescribed number of the terminal devices during progress of the game in the common game space;
- simulated signal generating means that generates a simulated operation signal that simulates the operation signal of each terminal device connected through said disconnected circuit;
- and
- simulated signal providing means that provides said simulated operation signal to the other terminal devices, respectively.