Fart sounds from Doctor Hawkins
Begin game play as Doctor Hawkins, then press L2 + R2 + Left + X.

Panning camera view
Press Start to pause game play, then hold L2 + R2 and press Circle, X, Circle, X.

Slow motion
Begin game play as Max, then hold R2 and press Up(4).

Crazy camera view
Press Start to pause game play, then hold L2 + R2 and press X, Circle, X, Circle.

Fixed camera view
Press Start to pause game play, then hold L2 + R2 and press Circle, X, Circle, Triangle.

Mixed character
Press Start to pause game play, then hold L2 + R2 and press Up, Down, Right, Left, X, Triangle, Circle, Square, Square + Start to play as a character that is part Kurt, Max, and Doctor Hawkins.

Kurt in boxer shorts
Hold L2 + R2 and press Square(2), Triangle, Square at the main menu.

Invincibility
Press Start to pause game play, hold L2 + R2 and press Up(2), Down(2), Left(2), Right(2), Square, Triangle, Square, Triangle, then hold Select until the pause screen disappears.