UFO2000 is a tactical squad simulation game, based largely on X-COM: UFO Defense. Its main feature over X-COM is support for multiplayer; however, it does not yet support a single-player mode. As of now, the stable versions require data files from X-COM to run; the beta versions will run without X-COM, but at a much more limited level.

License: free

Additional System Requirements:

• Allegro
• HawkNL
• Sqlite