- Name: UFO2000
- Homepage: http://ufo2000.sourceforge.net/
- Open Source: Yes, GNU GPLv2
- Link to Source Tarball\Zip file: https://sourceforge.net/projects/ufo2000/files/UFO2000%20beta/0.9.1176/ufo2000-0.9.1176-src.tar.bz2/download
- Description: UFO2000 is free and opensource turn based tactical squad simulation multiplayer game, heavily inspired by the famous UFO: Enemy Unknown and providing a very similar reimplementation of its tactical part.
Unlike OpenXcom, UFO2000 allows for online multiplayer matches, and bundles its own non-copyrighted art and sound assets, allowing it to be played without requiring a copy of the original X-Com: Enemy Unknown.