DOOM / DOOM II
                              cheat codes

iddqd      - Toggle God mode, 100% health; can't be injured, except in
             teleport frags, DOOM II level 30 monster spawns, and
             the dark room in E1M8 which ends the level (& episode)
idkfa      - All Keys, Firearms, Ammo, 200% armor
idfa       - All Firearms, Ammo, 200% armor                   [v1.666+]
idchoppers - Chainsaw
idbehold$  - Toggle power-up: on -> off -> on ($ = S, V, I, R, A or L)
             S=Berserk Strength, V=Invulnerability, I=Invisibility,
             R=Radiation Suit, A=Computer Automap, L=Light Amplifiers
idspispopd - Toggle no clipping (walk through walls)             [DOOM]
idclip     - Toggle no clipping (walk through walls)          [DOOM II]
idclev##   - Warp to episode # mission # [DOOM] or level ## [DOOM II]
             (deactivates '-nomonsters' command-line option)
idmypos    - Display co-ordinates/angle in hexadecimal notation
iddt       - Toggle map detail (can use in Map Mode only; repeatable)
             3 modes: normal -> all walls -> all monsters (-> normal)
idmus##    - Switch music to that from level ## [01-35 only]  [DOOM II]


Notes: To use the cheats, type 'em in while the game is in progress;
       There's no Backpack cheat; In Nightmare skill, only `idclev' &
       `iddt' are enabled; All cheats disabled in multi-player games.

For more details, see "DOOM Cheat Codes" in r.g.c.d.announce or:
  http://www.cee.hw.ac.uk/~mapleson/doom/helpdocs/doomchts.html


                        The deathmatch cheat code

One special cheat code to display your opponent(s) in deathmatch was
discovered.  To activate, in Map Mode keep Alt down and type `iddt' four
times.  This works in DOOM / DOOM II but not in Heretic with `ravmap'.
It was removed with the v1.9 patches to DOOM & DOOM II.


                           Taking screenshots

To take screenshots, start the game with `doom -devparm' or `doom2 -devparm'
and press F1 to create numbered .PCX files in the games' directory.

--
Frans P. de Vries | fpv@xymph.iaf.nl | Rec.Games.Computer.Doom FAQ maintainer