If you type in iddqd then whenever a monster attacks you nothing will happen!

idbeholdi temporary invisibility
idbeholdr temporary radiation suit
idbeholds temporary berserk
idbeholda temporary auto map
idbeholdv temporary invulnerability
idbeholdl temporary light
idfa full health , ammo, weapon, armor
idpt change map detail
idclevxx warp to levelxx 1to19
idclev19 warpto secret level try these codes while playing

Invincibility iddqd

All weapons idkfa

Reset ammunition idfa

Berserker strength idbeholds

Temporary invincibility idbeholdv

Temporary invisibility idbeholdi

Full automap idbeholda

Anti-radiation suit idbeholdr

Light amplification idbeholdl

Walk through walls idclip

Chainsaw idchoppers



Level select Ultimate Doom

idclev[episode# 1-4 & Level 1-9]



Level select Doom 2 and Final Doom

idclev[level number 01-32]



Toggle full map iddt

Display coordinates idmypos



Change music to indicated level

idmus[level number 01-32]



Kill all enemies (Level)

fhhall



Invisible to enemies until attack

fhshh



makes you taller and stronger

idtall



gives you a secret gun

idweap



Network cheat mode

Hold [Alt] and type "iddtiddtiddtiddt" in map mode.

Deathmatch cheat mode

Press T in the map to enter talk mode. Then, hold [Alt] and type "iddt" several times. This will reveal the entire map. Repeat the code to reveal all items. Repeating the code again will return the map to normal.