cheats DDQD -- Invulnerability
IDBEHOLDI -- Temporary invisibility
IDBEHOLDR -- Temporary radiation suit
IDBEHOLDS -- Temporary berserk
IDBEHOLDA -- Temporary automap
IDBEHOLDV -- Temporary invulnerability
IDBEHOLDL -- Temporary light
IDKFA -- Full health, ammo, weapons, armor and keys
IDFA -- Full health, ammo, weapons, and armor
IDDT -- Change map detail
IDCHOPPERS -- Gain chainsaw
IDCLEVxx -- Warp to level 'xx' where xx is 01 to 19
IDMYPOS -- Displays your position and bearing
IDMUSxx -- Music select. 'xx' is the level who's song you want.
IDSPISPOPD -- Walk through walls
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