On the main menu, select Arcade Game, and then enter the following code: (Using the D-Pad) Up, up, down, down, left, right, left, right, B, A. If done correctly, the game will start up instead of ...

known as Gryzor in Europe and Oceania, is a 1987 run and gun action game developed and published ... computer formats and as Probotector on the NES, released long later.