Abstract: A video game machine for business use for playing a long video game including a status memory for storing status data which represents the status of the game stopped, a forward conversion circuit for converting the status data to an easy-to-remember password by using a forward conversion function, a display circuit for displaying the password for the game player, a password input device into which the player inputs the password when he resumes the game, and a backward conversion circuit for converting the password inputted to the status data of the game stopped by using a backward conversion function. The initial condition of the game is set by the status data obtained by the backward conversion, and the game can be resumed from where it was stopped.