This is a port of the Freespace 2 code that was released by Volition Inc in April 2002. From the project web page at Icculus.org:

There is still a lot of work to do, but both the demo and full game run great. If you don't already own the full game, you may have a hard time finding it for sale, as copies of the game are pretty scarce these days. Be sure to apply the 1.2 patch for the full version, if you have not already.

If you don't have the full game, you can download a demo version from the Volition page listed below.

There is much enthusiastic work going on at the Freespaec Source Code Project, including a Babylon 5 total conversion. Their code incorporates the icculus linux SDL/OpenAL code, and compiles under linux.

The Freespace 2 code has also been adapted to work with the Freespace 1 data files, so if you own Freespace: The Great War and/or Silent Threat, you can play it using the linux client at http://icculus.org/~ravage/freespace/

License: free

Additional System Requirements: For multi & network, it's best to use the Source Code Project... ;) Especially when version 3.6.10 comes out (soon, perhaps in a few weeks - October '07?) Go to http://www.hard-light.net/forums, make a user account, and look in the forums for Turey's FreeSpace Open Installer... it gets the entire game + FSPort (FS1 + ST ported to FS2) for you! (And that's not all!) If you search for member jr2, and look in his sig, you will find a link to a Walkthough... although I doubt you'll need one. ;) Also there you will find links to alternative Installers.