Invincibile mode:Push Start to pause game play, then hit Up, Down, Left, Right, Left, Right, White, Black buttons on your controller at the options screen to become invincible.Unlimited ammunition:Push Start to pause game play, then hit Left, Right, Up, Down, Up, Down, Black, White buttons on your controller at the options screen to receive infinite ammunition. Unloack all missions:Push Up, L, Down, R, Left, L, Right, R, Up buttons on your controller at the mission selection screen in either single player or co-op campaign mode to get access to all missions in that mode.