Level Select: At the title screen where Abe says "hello," press and hold R1, and press Down, Right, Left, Right, Square, Cir, Square, Tri, Cir, Square, Right, Left. If you entered the cheat correctly, Abe will say "okay" and a level-select option will appear.
Movie Player: At the title screen where Abe says "hello," press and hold R1, and press Up, Left, Right, Square, Cir, Tri, Square, Right, Left, Up, Right. If you did the cheat correctly, Abe will say "okay" and a movie player will appear.
Green Fart: Press and hold R1, and press Up, Left, Right, Square, Cir, X any time during gameplay. After you enter the code, Abe toots a green air mine each time he farts.
Voice Cheat: Press and hold R1, and press Tri, Up, Cir, Left, X, Down, Square, Right any time during gameplay. After you enter the code, Abe can solve voice puzzles with any single sound.