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Playstation - Mad Stalker cheats

All robots available in story mode:
Push Up, Down, Left, Right, X, Circle button on your cotroller
at the title screen.

All robots available in versus mode
Push Up, Down, Left, Right, X, Circle button on your cotroller
at the title screen. Then go back to the title screen, and 
push Up, Down, Left, Right, Up, Down, Left, Right, Up, Down, 
Left, Right, X, Circle buttons.