Doom Cheats

Map all lines:
After pausing the game, push Triangle(2), L2, R2, L2, R2, R1, Square. In you have entered the code correctly 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.

Map all items:
After pausing the game, push Triangle(2), L2, R2, L2, R2, R1, Circle. In you have entered the code correctly 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.

Invincibility:
After pausing the game, push Down, L2, Square, R1, Right, L1, Left, Circle. In you have entered the code correctly a message will appear on the bottom of the viewing window and will disappear the game is resumed. Your character will be invincible, however unlike the invulnerability power-up, your screen will not turn white.

Weapons, ammunition, and keys:
After pausing the game, push X, Triangle, L1, Up, Down, R2, Left(2). In you have entered the code correctly a message will appear on the bottom of the viewing window and will disappear the game is resumed. All weapons, ammunition for them, and keys for current level will be available.

Level select:
After pausing the game, push Right, Left, R2, R1, Triangle, L1, Circle, X. If the code was entered correctly, a menu will appear in the top half of the viewing window. Press Left and Right to select a level, and confirm your entry with Square, Circle, Triangle, or X.

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

Random levels (version 1.0):
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.

Soundtrack:
Play track two of the game disc in an audio CD player to hear music from the game.