Operation WinBack Cheats (PlayStation 2)

At the "Press Start" screen, quickly press L1, R2, L2, R2, L2, Triangle, Circle, Triangle,
Circle, then hold L1 and press Start to unlock max power mode. If you entered the code
correctly, you will hear the sound of a gunshot. This mode allows you to start with all
weapons and infinite ammunition. Note: The code must be entered before
demonstration mode begins. -From: Spnkymnkybouy@aol.com

Successfully complete the game on the hard difficulty setting to unlock max power,
sudden death, and trial modes.

 Game Shark Codes 

At the "Press Start" screen, quickly press Up, Down(2), Right(3), Left(4), then hold
Circle and press Start to unlock all the Bosses as well as the engineers and a few army
characters in multi-player mode. If you entered the code correctly, you will hear the
sound of a gunshot. Most of the Bosses have odd guns and may not be able to back up
against walls or roll. Alternatively, successfully complete the game on the easy and
normal difficulty settings. Note: The code must be entered before demonstration
mode begins. -From: Spnkymnkybouy@aol.com

At the "Press Start" screen, quickly press Up, Down(2), Right(3), Left(4), then hold
Triangle and press Start to unlock trial mode. If you entered the code correctly, you
will hear the sound of a gunshot. This mode allows any level in the game to be played.
Note: The code must be entered before demonstration mode begins. -From:
Spnkymnkybouy@aol.com

At the "Press Start" screen, quickly press L2, R2, L2, R2, Circle, Triangle, Circle,
Triangle, then hold L1 and press Start to unlock sudden death mode. If you entered the
code correctly, you will hear the sound of a gunshot. This mode allows opponents and your
character to be killed with one hit. Note: The code must be entered before
demonstration mode begins. -From: Spnkymnkybouy@aol.com