|Engine||Any Boom-compatible source port|
|Release date(s)||No stable release yet (latest unstable – 0.8, released Jan 1, 2014)|
Freedoom is a free first-person shooter under continuous development. Several versions exist:
- Complete IWAD, based on Doom II IWAD
- Ultimate IWAD, based on The Ultimate Doom IWAD
- FreeDM IWAD, a stand-alone Deathmatch IWAD
A Demo IWAD, based on the shareware version of Doom, also used to be available.
Freedoom was possible because id Software released the source code of the Doom engine in 1997 under the GPL license. This allows any custom levels or other customizations designed for Doom or Doom II (e.g. PWAD files) to be used with Freedoom. It is possible, though, to use Freedoom resources on other ports, such as Doomsday Engine or Chocolate Doom, by combining it with a PWAD.
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.
Freedoom, like mentioned above, will need a Doom source port to run (Skulltag and Zandronum best supported). The Complete IWAD and the Ultimate IWAD are related in storyline and enemy mechanics to the original duo of games, but the actors, levels, and sectors are different. It does not require Ultimate Doom and Doom 2 to run.
This IWAD is the same story as Doom 2, but all the enemies, like the Zombieman or Hell Knight, are re-textured. Levels are also built differently. All weapons, from Fist to BFG9000, are redrawn. the Super Shotgun is still included and redrawn. The sounds of everything are redone.
This IWAD is the same story as The Ultimate Doom but like Complete Freedoom's attributes, has almost everything redone, except the story.
This IWAD is in no way related to any PWADs or IWADs. It is only meant for online Deathmatches.