Codes
Type in the following codes during gameplay:
idbeholda-Full automap
idbeholdi-Temporary invisibility
idbeholdl-Light amplification visor
idbeholdr-Anti-radiation suit
idbeholds-Berserker strength
idbeholdv-Temporary invincibility
idchoppers-Chainsaw
idclev[episode number][map number]-Level select
iddqd-Invincibility
iddt-Toggle full map; full map and objects; normal map
idmus[level number]-Change music to indicated level
idmypos-Display coordinates and heading
idkfa-All weapons, keys, ammo, and 200% armor
idspispopd-Walk through walls
Full automap with object Indicators
With the automap displayed, type IDDT twice to have a full map, plus object indicators to see enemies, items, etc.
Code - Effect
IDDT *Twice, with automap displayed* - Gives you a full automap, and adds object indicators
Secret Levels
Effect - Code
E1M9, Military Base - Find secret exit in E1M3, Toxin Refinery. The secret exit is located across the pit of slime near the entrance of the level.
E2M9, Fortress of Mystery - Find the secret exit in E2M5, Command Center.
E3M9, Warrens - Find the secret exit in E3M6, Mt. Erebus.
E4M9, Fear - Find the secret exit in E4M2, Perfect Hatred.The secret exit is north of the Cyberdemon.
Super Codes
Enter these codes while playing the game, don't go to the main menu to imput these.
Code - Effect
FHHALL - Destroys all enemies except Lost Souls
FHSHH - Makes you completely invisible to all enemies