Pause the game and press one of the following combinations: Unlimited Ammo: R1, L1, R2, R2, L2, R1, L1, R2, L2 Invincibility: L1, L1, L1, R2, L1, R1, R1, L1, R2 Unlock weapons & missions: L1, R2, L2, R1, R1, L2, R2, L1