Doom Cheats and Codes

Cheat mode:
Enter one of the following codes during game play to activate the corresponding cheat function. Note: Codes may not be enabled during Co-op or Deathmatch modes.

Invincibility
Press Pause, * + Pause. Alternatively, press Pause, 9, 4, 7, 4, 9, 2, 1, 0.

All keys, weapons, full ammunition
Press Pause, # + Pause.

Fire weapons while in automap screen
Hold C + B. If the controls have been reconfigured, hold the buttons assigned to "Use" and "Fire".

Deathmatch or Co-Op more music:
Begin a multiplayer game in Level 23. Complete the level, then reset one of the Jaguars during the ending text. Start a new Deathmatch or Co-Op game on the Jaguar that was reset to play music during the next game in the place of sound effects.