Press Start to pause game play, then hold L and press one of the following cheats:
Code: Result:
Up(2), Down(2), Left, Right, Left, Right, X, Circle. All weapon upgrades
Up(2), Down(2), Left(2), Right(2), Square, Triangle Invincibility
Triangle(2), X(2), Square, Circle, Square, Circle, Down, Right. Refill ammunition
Triangle(2), X(2), Square, Circle, Square, Circle, Right, Down. Unlimited ammunition
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