Unlock Slow Motion Sounds:
Enter L1, L2, R1, R2, triangle, square, X, circle, at the pause screen.
Get Eight Pain Killers:
Pause the game and enter: L1, L2, R1, R2, triangle, circle, X, and circle.

Invincibility:
Pause the game and press L1(2), L2(2), R1(2), R2(2). Note: This code may need to be re-enabled after an auto-save.

All Weapons and Full Ammunition:
Pause the game and press L1, L2, R1, R2, Triangle, Circle, X, Square

Level Select:
Play through the game normally until completing Subway A1. Return to the main menu and press Up, Down, Left, Right, Up, Left, Down, Circle
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