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.

Unlimited health
Press Start to pause game play, then press L1(2), L2(2), R1(2), R2(2). Note: This code may need to be re-enabled after an auto-save. No life will be reduced when you are shot.

Unlimited ammunition
Press Start to pause game play, then press L1, L2, R1, R2, Triangle, Circle, X, Square.

All weapons and full ammunition
Press Start to pause game play, then press L1, L2, R1, R2, Triangle, Square, X, Circle.

Unlimited bullet time
Press Start to pause game play, then press L1, L2, R1, R2, Triangle, X(2), Triangle. Repeat this code to disable its effect.

Slow motion sounds
Press Start to pause game play, then press L1, L2, R1, R2, Triangle, Square, X, Circle.

8 Pain Killer Pills
Press Start to pause game play, then press L1, L2, R1, R2, Triangle, Circle, X, Square. Note: This also unlocks all weapons and full ammunition.

Additional difficulty settings
Successfully complete the game under the "Fugitive" difficulty setting to unlock the "Dead On Arrival" and ''The New York Minute'' settings.

Last Challenge bonus level
Successfully complete the game under the "Dead On Arrival" difficulty setting.

Secret programmer room
Successfully complete the Last Challenge level. The doors in the back of the room will open up to the Remedy Room.