DOS legends cheat quick guide and modern setup: Doom, Duke, Prince, Keen

DOS legends cheat quick guide and modern setup: Doom, Duke, Prince, Keen

7/8/26

DOS legends cheat quick guide and modern setup: Doom, Duke, Prince, KeenWant to go back to 320×200 heaven? We’ve put together the cheat list and modern setup tips so you can jump in right away. The goal: a working classic experience in minutes, that nostalgic sense of achievement, and zero technical stress. The good news: the DOS era’s iconic cheats still work today – you just need to know what to run them in and how to set things up.

What should you run them with?Why DOSBox Staging, and when should you use 86Box\/PCem?
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  • - IDDQD – God mode (for Quake fans: invulnerability; the screen may get a yellowish tint).
  • - IDKFA – All weapons, keys, max ammo, 200% armor.
  • - IDFA – All weapons and ammo, but no keys.
  • - IDCLIP – No clipping (walk through walls) in Doom II. For Doom 1, the old one is: IDSPISPOPD.
  • - IDCLEVxy – Level warp. Doom 1: IDCLEV15 = E1M5 (first number is episode, second is level). Doom II: IDCLEV15 = MAP15.
  • - IDMUS xy – Music change. Doom 1: IDMUS15 = music of E1M5, Doom II: IDMUS15 = music of MAP15.
  • - IDBEHOLD + letter – Powerups (for example IDBEHOLDV = invulnerability).
  • - IDDT – Type it on the automap; pressing it multiple times reveals the map\/monsters\/items.


Tip: Doom sounds best with General MIDI (MPU-401) for music. In DOSBox Staging, it’s worth using Fluidsynth with a good soundfont (for example Arachno). In the Staging settings: mididevice=fluidsynth, soundfont=…\/arachno.sf2.

Duke Nukem 3D (DOS 1.3D\/Atomic)The codes activate by typing, with slight differences depending on the version. The most common ones are:

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