Hidden mode
At the mode selection screen, press Right, Down, Right, Square, Up, Square, Square, Triangle, Down, Right, Down, Right, Square, Triangle. If you entered the code correctly, you will hear the sound of a gun. -From: Olikong@aol.com

Mirrored levels
At the mode selection screen, press Left(2), Right, Square, Down(2), Up, Triangle, Up, Right, Down, Up, Left, Down, Square. If you entered the code correctly, you will hear the sound of a gun.

First person view
At the mode selection screen, press Up(4), Down(4). If you entered the code correctly, you will hear the sound of a gun. -From: Olikong@aol.com

Turbo mode
At the mode selection screen, press Down, Triangle, Up, Square, Triangle, Down, Right, Down, Right, Square, Triangle. If you entered the code correctly, you will hear the sound of a gun. -From: Olikong@aol.com

Love mode
At the mode selection screen, press Left, Right(2), Square, Triangle. If you entered the code correctly, you will hear the sound of a gun. -From: Olikong@aol.com

Night mode
At the mode selection screen, press Up, Right, Down, Left, Up, Square, Triangle. If you entered the code correctly, you will hear the sound of a gun. -From: ajgarcia@bigplanet.com

No crosshair
At the mode selection screen, press Right(3), Square. If you entered the code correctly, you will hear the sound of a gun. -From: Olikong@aol.com

No scope
At the mode selection screen, press Right, Down, Right, Square, Right, Down, Right, Square. If you entered the code correctly, you will hear the sound of a gun. -From: Olikong@aol.com

No enemy cursor
At the mode selection screen, press Right(4), Left, Down, Up, Right. If you entered the code correctly, you will hear the sound of a gun. -From: Olikong@aol.com

Infinite time
Pause the game in arcade mode and press Square(3), Circle, X, R1, R2, L2, L1, Triangle, Select. If you entered the code correctly, you will hear the sound of a gun. Resume the game and the next part of the level will not have an active timer.

Exchange a half of life for 5 seconds
Pause the game in arcade mode and press Up(2), Down(2), Left, Right, Left, Right, X, Circle. If you entered the code correctly, you will hear the sound of a gun. -From: Olikong@aol.com

Exchange 5 seconds for half of life
Pause the game in arcade mode and press Circle, X, Right, Left, Right, Left, Down(2), Up(2). If you entered the code correctly, you will hear the sound of a gun. -From: Olikong@aol.com

100 challenge mode
Successfully complete all nine outdoor shooting range challenges to unlock 100 challenge mode.

Extra options
Successfully complete the game on any difficulty setting to unlock a real time window and up to 8 health in the options menu. Successfully complete the game more that twice on any difficulty setting to unlock infinite credits in the credits section of the options menu and +30 in the time limit section.