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Developer(s) Freedoom project
Publisher(s) Freedoom project
Designer(s) Freedoom project
Engine Any Boom-compatible source port
Platform(s) Linux, Windows, OS X, MS-DOS, Android, others
Release date(s) No stable release yet (latest unstable – 0.9, released Oct 14, 2014)[1]
Genre(s) First-person shooter
Mode(s) Single-player, multiplayer

Freedoom is a free first-person shooter under continuous development. The project distributes three IWAD files: the single-player campaigns named Freedoom: Phase 1 and Phase 2, and FreeDM, which contains a collection of deathmatch levels.

The project presents itself [2] as complementary to the free source code of the Doom engine released by id Software in 1997 under the GPL license. It allows custom levels and other customizations designed for Doom or Doom II (e.g. PWAD files) to be used with Freedoom.


  • Features 1
  • Gameplay 2
    • Freedoom: Phase 1 2.1
    • Freedoom: Phase 2 2.2
    • FreeDM 2.3
  • Similar projects 3
  • References 4
  • External links 5


As downloaded from the official Freedoom site, it is distributed as IWAD (game data) files only without an engine. The player must provide a Doom source port such as PrBoom, ZDoom, Boom, or any other Boom-compatible source port. Freedoom requires an engine with Boom extensions and will not work with the original Doom engine's source release. It is possible, though, to use Freedoom resources on other ports, such as Doomsday Engine or Chocolate Doom, by combining it with a PWAD.[2]


The gameplay mechanics (monster and weapon behavior, etc.) are identical to the original Doom games, but completely original artwork is used.

Freedoom: Phase 1

This IWAD contains levels arranged into episodes, similar to the original Doom. This allows mods for the original game to be played.

Freedoom: Phase 2

This IWAD contains levels in a flat linear progression, similar to Doom 2. This allows mods for Doom 2 to be played.


This IWAD is a collection of original deathmatch levels, using the same artwork as the main Freedoom IWADs.

Similar projects

The project has also inspired other similar projects, such as Blasphemer for Heretic,[3] and Zauberer, for Hexen.[4]


  1. ^ "Freedoom 0.9 released". Freedoom. Freedoom project. Retrieved 14 October 2014. 
  2. ^
  3. ^ Blasphemer, Google Code
  4. ^ Zaubrer, GitHub

External links

  • Freedoom project official website
  • Freedoom article at the Doom Wiki
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