All Weapon Upgrades:
Hold L and enter UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, CIRCLE. Invincibility:
Hold L and enter UP, UP, DOWN, DOWN, LEFT, LEFT, RIGHT, RIGHT, SQUARE, TRIANGLE. Refill Ammunition:
Hold L and enter TRIANGLE, TRIANGLE, X, X, RIGHT, CIRCLE, SQUARE, CIRCLE, DOWN, RIGHT. Unlimited Ammunition:
Hold L and enter TRIANGLE, TRIANGLE, X, X, SQUARE, CIRCLE, SQUARE, CIRCLE, RIGHT, DOWN.