Glossary
Glossary
The vocabulary of classic FPS games and the Doom community. Each entry links to its canonical longer treatment when one exists.
Deathmatch
Doom's competitive PvP mode. Doom popularised it; the term still applies to the same mechanic in any FPS.
DECORATE
The older modding language used by ZDoom and early GZDoom for defining actors. Largely superseded by ZScript.
Freedoom
A free, open-source IWAD replacement compatible with Doom-engine source ports. Lets you play Doom mods legally without owning the original.
IWAD
Internal WAD — the original game data file from id Software (DOOM.WAD, DOOM2.WAD). You need to own this legally.
Megawad
A large PWAD that contains 32 maps — a full episode replacement for Doom or Doom II.
PWAD
Patch WAD — community-made content that loads on top of an IWAD.
Source Port
A modern engine that runs Doom on current hardware. GZDoom, Zandronum, Chocolate Doom, Crispy Doom.
WAD
Where's All the Data — Doom's file format for storing maps, sprites, sound and code.
ZDoom
An influential, now-discontinued Doom source port whose codebase lives on in GZDoom and Zandronum.
ZScript
GZDoom's modern modding scripting language. Replaces DECORATE for serious mods.