Cheats.

Enter at start screen before main menu. Infinite Ammo: R2 R1 Triangle L2 L1 Up R2 R1 Triangle L2 L1 Up. Add Weapon: Up Down Left Right Circle Square Up Down Left Right Circle Square. Psychedelic Mode: Up R2 Circle Left Triangle Square L2 L1 Circle R1. Infinite Health: R3 L3 Right Left L1 R1 R3 L3 Right Left L1 R1. Unlock Missions and Pictures: L2 R2 L1 R1 L1 L2 L2 R2 L1 R1 R1 R2.