id Software has released the source code to their classic game, Doom, under the GNU General Public License. This means that the engine which powers Doom is Free Software. However, the game engine is only one component of a complete game.The Doom engine uses an "IWAD" file to store all of its game data. This contains the raw data used by the game — the artwork, sound effects, levels, everything which defines Doom as a game. Until now, one of the original proprietary files was still needed in order to play Doom.The Freedoom project aims at collaboratively creating a free IWAD file. Combined with the free source code, this results in a complete game based on the doom engine which is Free Software.

Doom source code + Freedoom IWAD

The purpose of Freedoom

Freedoom has multiple purposes:

  1. To create a complete free game based on the Doom engine.
    A large library exists of modifications which have been created for Doom over the past fifteen years; Freedoom maintains compatibility with the original IWAD files so that these modifications can be played.
  2. To create a pool of free game material for people to reuse in their own projects.
    All material in the Freedoom project is released under the modified BSD license, allowing people to reuse it as they wish. Freedoom contains a large collection of material. This includes Doom levels, sound effects, graphics, and music.
  3. To serve as a demonstration of the talent and creativity of the Doom community.
    Despite its age, Doom has retained a surprisingly large community of fans. Freedoom is developed collaboratively by fans of the original Doom games.

A modern source port is needed to play Freedoom. We recommend one of the following ports:

PrBoom GNU GPL GNU/Linux, *BSD, Mac OS X, other POSIX, WindowsSoftware, OpenGL
Odamex GNU GPL GNU/Linux, *BSD, Mac OS X, other POSIX, WindowsSoftware, OpenGL
ReMooD GNU GPL GNU/Linux, *BSD, Mac OS X, other POSIX, WindowsSoftware
The Eternity Engine GNU GPL DOS, WindowsSoftware
Boom GNU GPL DOS onlySoftware
Risen3D GNU GPL Windows onlyOpenGL

It is possible to run it with Chocolate Doom, although it requires a special workaround.

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Blog RSS Feed Report abuse Latest News: Freedoom 0.5 released

2 comments by leilei on Sep 5th, 2006

Notable changes:
- New weapon sprites: Shotgun, super shotgun, chaingun, rocket launcher, and plasma gun have new graphics
- New sounds: Pistol firing, mancubus pain, explosion
- New "skeleton" sprite placeholder for unfinished monsters
- New monster sprites: Baron (WIP), Revenant
- Flats and patches (wall/floor textures) updated with a cleaner, detailed appearance
- FreeDM IWAD project, among other smaller things

Get it from the Freedoom site

Downloads RSS Feed Latest Downloads
Smart Scavenger v3.2

Smart Scavenger v3.2

Oct 13, 2014 Prefabs 26 comments

Have you even come across an unavoidable large ammo pickup in a narrow hallway or right in front of a switch, and were forced to pick it up, even though...

FreeDoom Enhanced

FreeDoom Enhanced

Sep 12, 2014 Effects GFX 0 comments

Adds GL specific features to FreeDoom. Requires GZDoom.

Freedoom Enhanced v0.4 and 3xBR v0.1

Freedoom Enhanced v0.4 and 3xBR v0.1

Apr 29, 2014 Prefabs 0 comments

Freedoom is an unfinished IWAD, so this project will remain a work-in-progress until it is finished. I've replaced the sprites for the Revenant's fireballs...

FreeDoom v0.8

FreeDoom v0.8

Apr 29, 2014 Demo 0 comments

The primary Freedoom version, featuring 32 levels in one massive chapter. It is compatible with Doom II mods.

Ultimate FreeDoom v0.8

Ultimate FreeDoom v0.8

Apr 29, 2014 Demo 2 comments

An alternative game, with 36 different levels split into four chapters. It is compatible with mods for the original Doom and The Ultimate Doom.

FreeDM v0.8

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Apr 29, 2014 Demo 0 comments

Beat your friends in these 32 levels designed for competitive deathmatch play.

Post comment Comments  (0 - 10 of 25)
szemi Jun 22 2014, 5:02pm says:

Glad Doom source code is out, you made a very cool game. :D

+1 vote     reply to comment
Eagle12687 Feb 5 2013, 2:49am says:

I like the idea of FreeDoom. The engine is open-source, so naturally people should take advantage of that fact. However, some of the monsters look a bit poor. I would like to try my hand at making my own monsters for the project, (I am an hobby artist) but I am using Windows Vista and things like XWE do not work very well. Is there some other way I can import monsters? The worst that can happen is that they won't look very good either, but it couldn't hurt for me to try.

John 3:16 "For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life."

+4 votes     reply to comment
JFreakXD Jul 8 2013, 6:40pm replied:

/John 3:16 "For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life."/


+3 votes     reply to comment
VGames Sep 23 2013, 8:14pm replied:

Make sure you read all of that chapter. Very important stuff.

+4 votes     reply to comment
JFreakXD Sep 24 2013, 9:29am replied:

yeah, but im not there yet. im still in the old testament.

+1 vote     reply to comment
SamVision Mar 1 2011, 7:23pm says:

Still needs a better plasma gun pickup sprite. I mean come on! The existing one looks nothing like the HUD sprite.

+3 votes     reply to comment
Luka_Grunt Aug 7 2010, 8:59pm says:

There is a newer version of FreeDoom...0.6.1 i think...
Just few people working on this freeware game...what you expected?
Tekken 5 graphics, lol ! xD

+2 votes     reply to comment
dave_5430 Jan 9 2010, 6:15pm says:

Ya gotta be a cheap bastard if ya can't spare a buck to buy Doom nowadays...

but it's still a bloody nice attempt to Doom ya know, I mean alot of projects/mods can work by using FreeDoom, so ya don't have to actually own Doom to play those things...

But aside from that I still to date wonder 'why' freedoom was made...

+2 votes     reply to comment
unknow5763 Dec 3 2009, 12:19pm says:

and this website out of date ver 4.1 or something is out now

+2 votes     reply to comment
unknow5763 Dec 3 2009, 12:18pm says:

use zdoom ?

+3 votes     reply to comment
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Released Sep 28, 2006
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