Web site: freedoom.github.io
Category: Games
Sub-Category: FPS
Platform: Linux, OS X, Windows, MS DOS, Android
License: BSD, GNU GPL
Interface: GUI
Wikipedia: Freedoom
First release: April 16, 2003
Freedoom – a project aims to provide all the content needed to form a complete, entirely free/libre game for the Doom engine. It is designed to be compatible with most custom levels, music, graphics and other modifications (“mods”) made for the original Doom games by Doom fans and artists over the decades.
In 1999 id Software released the source code to their classic game Doom (under the GNU General Public License). The game as a whole did not get this treatment, however, which means that while the program code that powers Doom is free, the actual content of Doom – graphics, audio, levels, setting and characters – remains proprietary. The Freedoom project aims to fill this gap and create a complete free and libre first person shooter game.
By itself, Freedoom is just the content of a game and must be paired with a Doom-compatible game engine to be played: the download page lists some recommended programs.
Freedoom is actually three entire games, with two single-player campaigns and one collection of multiplayer deathmatch arenas (FreeDM).