Cheat mode: Enter one of the following codes during game play to
activate the corresponding cheat function.
All weapons, keys, ammo, and 200% armor
All weapons, ammo
Light amplification visor
Walk through walls
idclev<episode number><map number>
Toggle full map; full map and objects; normal map
Display coordinates and heading
Change music to indicated level
Hint: Hidden area: On level 30, enable the idclip code. Walk into
the room with the Demons, Cacodemons, Imps, Lost Souls, and lava.
Fall in the lava and keep walking. Finally, watch the marines
mugshot and enable the iddqd code.
Information in this section was contributed by XtrmBean2.
Hint: The Gateway To Hell secret room:
Enable the idclip code at the start of the "Gateway
To Hell" level to walk through walls. Also enable the iddqd
code for immortality. Walk forward and turn left into the wall
opposite the transporter until you are in the main room. Then,
turn right and walk forward into a small green room where some
enemies are being transported and crushed. Keep looking inside
the walls until you find another huge room with weapons and a
few of Berserker Packs. Sometimes there is an unkillable Spectre
Information in this section was contributed by TheFiendRuler.
Hint: Defeating the final Boss: In the last level, find the wall with a giant demon
skull that shoots blocks that turn into demons. Enable the idclip
code and walk through it until you see a man's head (John Romero)
on a pike. Shoot or chop it with a chainsaw. You will then have
completed the game.
Information in this section was contributed by Seanofthedead12.
Former Soldiers: They resemble your old friends, but now they
just fire pistols at you. They drop clips for the chaingun and
pistol when killed.
Former Sergeants: Meaner and tougher. They carry shotguns and
do more damage then soldiers. They drop shotguns when killed.
Imp: This creature throws fireballs and takes more bullets to
Demon: Appear in most areas and can rip your head off if you are
not careful. If you see more of them, use the chaingun.
Cacodemon: These creatures are ugly and have one big mouth. If
they see you, they will fire lightning balls from their mouth.
Use your rockets.
Mancubus: You have to use more then a chaingun to kill them. Use
ammo with caution.
Arachnotron: Fires plasma energy at you. Use your rifle.
Spider Demon: The ultimate enemy. Has a super chaingun mounted
on her body. Use your plasma rifle or rocket launcher.