DOOM Cheats

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.
GBA indicates Gameboy Advance, most codes for it are in Pause with L + R (paddles on top of Gameboy Advance) held and buttons hit. Multiple codes can be entered at a time by letting up on the L + R, then holding them again and entering the buttons. New codes will be added as they are discovered.

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

GBA Berserk Mode Pause the game, then hold L + R and press B, A, B, A x5.
GBA Invincibility Pause the game, then hold L + R and press B x3, A x5.
GBA Anti-radiation suit Pause the game, then hold L + R and press B x2, A x6.

idchoppers Gives you the chain saw (long story behind the message)

idclev Warp (followed by episode number and level number)
GBA Skip to next level Pause the game, then hold L + R and press A, B, A x2, B x3, A.
GBA Pause the game, then hold L + R and press A, B, A x2, B x2, A x2.
You will advance about 5 levels, depending on the current level.

# idclip No clipping (you can walk through walls)

iddqd Degreelessness (God) mode
GBA Pause the game, then hold L + R and press A x2, B, A x5.

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)
GBA Pause the game, then hold L + R and press A, B x2, A x5.

# 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)