In the game, quickly tap these inputs:
Slow Motion: R2, L2, Up, Down, X, Up, L2
Full Health: R2, L2, Up, Down, X, Up, Down
Gravity: R2, L2, Up, Down, X, L2, L2
Punch Mode: R2, L2, Up, Down, X, Up, Up
Lethal Charge: R2, L2, Up, Down, X, R1, R1
Bomb Mode: R2, L2, Up, Down, X, Up, L1
Megaforce(Restart Removes): R2, L2, Up, Down, X, R2, R2
Nailgun Mode: R2, L2, Up, Down, X, L1, L1
Level Select(In Main Menu): R2, L2, Up, Down, Square, Tri, Cir