All weapons:
Press R2, L2, Up, Down, X, Up, Square, X during game play.
Full heal:
Press R2, L2, Up, Down, X, Up, Down during game play.
Lethal charge:
Press R2, L2, Up, Down, X, R1, R1 during game play.
Level select:
Press R2, L2, Up, Down, Square, Triangle, Circle at the main menu.
God mode:
Press R2, L2, Up, Down, X, R2, L2, R1, L1 during game play.
Slow motion:
Press R2, L2, Up, Down, X, Up, L2 during game play.
Punch mode:
Press R2, L2, Up, Down, X, Up(2) during game play.
Toggle gravity:
Press R2, L2, Up, Down, X, L2(2) during game play.
Bomb mode:
Press R2, L2, Up, Down, X, Up, L1 during game play.
Megaforce mode:
Press R2, L2, Up, Down, X, R2(2) during game play. Restart the level to remove its effect.
Nailgun mode:
Press R2, L2, Up, Down, X, L1(2) during game play. Weapons will pin people to walls when this code is activated.