File formats

List of file types used by Doom Engine

 * .lmp &mdash; Doom engine unit of data. The particular format is defined by the lump type.
 * .wad &mdash; Doom engine level resource file (contains textures, sprites, music, and level layout)

List of file types used/created by Doom Engine editing programs

 * .deh &mdash; DeHacked file which allows editing of hardcoded aspects of Doom engine
 * .bex &mdash; Enhanced DeHackEd-type file used by Boom and other source ports
 * .lev &mdash; File which can be loaded along with a PWAD and renames Doom levels
 * .mus &mdash; Music file format of Doom, Heretic, Hexen and Strife

Doom utility file types

 * .bat &mdash; Executable batch file that contains multiple DOS commands, and can be used to present a menu and run specific programs or utilities
 * .exe &mdash; An executable program, such as SETUP.EXE or DOOM.EXE itself