Invincibility:
Pause, then hold L2 and press Up, Left, Down, Right, Triangle, Square, X, Circle.
Unlimited Ammo:
Pause, then hold L2 and press Down, Left, Right, X, Square, Circle.
All Weapons:
Pause, then hold L2 and press Up, Left, Right, Down, Triangle, Square, Circle, X.
Stealth Mode:
Pause, then hold L2 and press X, X, Square, Square, Triangle, Triangle, Circle, Circle, X, X.
Defeat Alien Troopers:
To defeat Alien Troopers, hold R1 and run around them, shooting them with the laser. If they are in a group, they usually will not be paying attention. Just stand back and shoot them in the head.
Defeat the Boss in the Alien Base:
After Dr. Carter gets captured by the aliens, you must make your way through mazes and buildings to find her. When you do, her father, who has turned into an alien himself, sends a war drone after you, The best way to defeat it is to destroy the laser arm on the left, followed by the one on the right. Every now and then, pick up the items lying around. Once they are gone, destroy the Drone. If the laser arm starts to fire at you, or the drone brings out its machine guns, just press Triangle to use your shields
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C-12: Final Resistance Cheats at CheatingDome.com.