The Ultimate Doom Cheats, Codes, and Secrets for PC

Codes

All codes
Enter these codes while playing the game, don't go to the main menu to imput these.

Invunerabilty: iddqd

All weapons, 200% armor, keys, ammo: idkfa

Berserk: idbeholds

Temporary invincibility: idbeholdv

Temporary invisibility: idbeholdi

Anti-radiation suit: idbeholdr

Full automap: idbeholda

Light amplification visor: idbeholdl

''No Clipping'': idspispopd

Chainsaw: idchoppers

Select Level: idclev(episode number)(map number)

Toggle map with objects: iddt

Display coordinates and heading: idmypos

Change music to indicated level: idmus(level number)
Contributed By: SolidSnake15.
0 1
All weapons, full ammo, 200% armor WITHOUT keys:
To get 200% armor, all weapons, and full ammo without the keys, press IDFA during gameplay.
Contributed By: peach freak.
0 0
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.
Effect Code
Gives you a full automap, and adds object indicators IDDT *Twice, with automap displayed*
Contributed By: peach freak.
0 0

Effect	Code
Gives you a full automap, and adds object indicators	IDDT Twice, with automap displayed

Unlockable	How to Unlock
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.)

Contributed By: ND9k.