24 Cheat Mode: Highlight "Options" at the main menu and hold L1 + L2 + R1 + R2. This will bring up the "Security Clearance" screen where you'll enter the following codes. Hold X to change a character, and press Square to enter a code. Invincibility: Enter 66BAUER as a code. Infinite Ammo: Enter 62ALMEIDA as a code. All Missions: Enter 72DESSLER as a code. All Bonuses: Enter 54PALMER as a code. Completion bonuses: Finish a mission with at least 90% completion to unlock pictures, models, and movies for that mission.