Map all items
Pause game play and press Triangle(2), L2, R2, L2, R2, R1, Circle. To confirm correct code entry, a message will appear on the bottom of the viewing window and will disappear the game is resumed. All objects including enemies, items, weapons, and secret switches will appear on the map as blue triangles.
Map all lines
Pause game play and press Triangle(2), L2, R2, L2, R2, R1, Square. To confirm correct code entry, a message will appear on the bottom of the viewing window and will disappear the game is resumed. All walls and boundaries will appear on the map for the current stage.
More Codes
Note: To do the codes you have to pause the game then push these buttons
Invincibility: Down, L2, Square, R1, Right, L1, Left, Circle
All Weapons: X, Triangle, L1, Up, Down, R2, Left, Left
X-Ray Vision: L1, R2, L2, R1, Right, Triangle, X, Right
Complete Map of Stage: Triangle, Triangle, L2, R2, L2, R2, R1, Square
Items On Map: Triangle, Triangle, L2, R2, L2, R2, R1, Circle
Level Warp: Right, Left, R2, R1, Triangle, L1, Circle, X
Random levels
Enter DOOMMNLxxx or H3LL1SHxxx, where xxx the same character such as !!! or 666, at the password screen. The game will start at a random level with an unusual amount of ammunition, armor, and life.