Level Skip
Pause game, and then hold L2 and press the following: Up, Down, Left, Right, Triangle, X, X, Triangle, Right, Left, Down, Up. Quickly unpause the game and release L2
Weapons Power Up
Pause game, and then hold L2 and press the follwoing press up, down, left, right, triangle, x, square, and release L2. Quickly unpause the game.