Pause the game, then press R1, Circle, L1, Square, Circle, R1, Right, Right,
Circle, Right. The game will return to the main menu if entered correctly. The
"Unlimited Ammo" option will now appear.
During games pause and press L1, L2, R1, R2.
At the cheats menu enter R2, R1, L1, L2, Left, Down, Right, Up, Square.
Unlock All Levels
At the level select screen, hold Up on controller 2 then press Start, Select,
Select, Square on controller 1.
On cheat menu on Extras put r2, r1, l1, l2, left, down, right, up, square.
Unlock All Artwork
Pause the game, then press R1, Square, R1, Square, Circle, Left, R1, Left, Left.
The game will return to the main menu if entered correctly. Enter the "Extras"
menu to see an option to unlock all artwork.