Unlock All Characters In Versus Mode
At the Press Start Screen, press Up, Down, Down, Right, Right, Right, Left, Left, Left, Left, then hold Circle and press Start.
Unlock Trial Mode
At the Press Start Screen, press Up, Down, Down, Right, Right, Right, Left, Left, Left, Left, then hold Triangle and press Start.
Unlock Sudden Death Mode
At the Press Start Screen, press L1, R2, L2, R2, L2, Triangle, Circle, Triangle, Circle, then hold L1 and press Start.
Various Cheats
The following codes must be used at the PRESS START screen before the demo of the game starts rolling. You should hear a sound.
All Stages (Trial Mode)
Up, Down, Down, Right, Right, Right, Left, Left, Left, Left then hold Triangle and press Start.
One Shot Kills (Sudden Death Mode)
L2, R2, L2, R2, Circle, Triangle, Circle, Triangle, then hold L1 and press Start.
Max Ammo And All Guns (Max Power Mode)
L1, R2, L2, R2, L2, Triangle, Circle, Triangle, Circle, then hold L1 and press Start.
All Characters In Multi-Player Mode
Up, Down, Down, Right, Right, Left, Left, Left, Left then hold Circle and press Start.
Extended Camera Capture
Don't forget that with Jean's submachinegun equipped, you can camera capture an enemy further away, switch to another weapon and maintain the "lock-on".