Invincibility:
Hold R1 and press Circle, Triangle, Square, X, Down(3), Circle, Triangle, Square, X during game play.

Level select:
Hold R1 and press Down, Right, Left, Right, Square, Circle, Square, Triangle, Circle, Square, Right, Left at the first options screen, where Abe says "Hello".

View FMV sequences:
Hold R1 and press Up, Left, Right, Square, Circle, Triangle, Square, Right, Left, Up, Right at the first options screen, where Abe says "Hello".

Green air mines:
Hold R1 and press Up, Left, Right, Square, Circle, X during game play. Abe will produce a green air mine every time he farts.

Instant voice puzzle solution:
Hold R1 and press Triangle, Up, Circle, Left, X, Down, Square, Right during game play. Select any sound to solve the game's voice puzzles.