What are the DOOM cheat codes?
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Here is a list of the cheat codes from DOOM. During play, just type
the codes in with the keyboard. You need not hit ENTER after the code.
After entering, a message should be displayed at the top of the screen
telling which cheat mode was activated.

idbehold Displays menu (followed by S, V, I, R, A, or L for
choice)
S=Strength (Berserk)
V=Invulnerability
I=Partial invisibility
A=Full Automap (computer map)
R=Anti-radiation suit
L=Light amplification visors
idchoppers Gives you the chain saw (long story behind the
message)
idclev Warp (followed by episode number and level number)
# idclip No clipping (you can walk through walls)
iddqd Degreelessness mode (God mode)
iddt Toggles Automap between normal, full, and full with
objects
(enter when in Automap mode)
+ idfa Gives full ammo, 200% armor, and all weapons but no
keys
idkfa Very Happy Ammo (full ammo, 200% armor, all weapons &
keys)
# idmus Changes the music to a certain mission (followed by
episode and level number)
idmypos Displays your bearing and coordinates in hex
@ idspispopd No clipping (you can walk through walls)

#: Found only in DOOM II
@: Only found in in DOOM I
+: Only found in DOOM v1.4bt and up