Weapons, ammunition, and keys: Pause the game. Press X, Triangle, L1, Up, Down, R2, Left(2). All weapons, ammunition for them, and keys for current level will be available.

Map all lines: Pause the game. Press Triangle(2), L2, R2, L2, R2, R1, Square. All walls and boundaries will appear on the map for the current stage.

Map all objects: Pause the game. Press Triangle(2), L2, R2, L2, R2, R1, Circle. All objects including enemies, items, weapons, and secret switches will appear on the map.

Invincibility: Pause the game. Press Down, L2, Square, R1, Right, L1, Left, Circle.

Level select: Pause the game. Press Right, Left, R2, R1, Triangle, L1, Circle, X.

Transparent walls: Pause the game. Press L1, R2, L2, R1, Right, Triangle, X, Right. Your character may now see through one layer of wall or sprites.