Uwe Hermann | A slightly paranoid Debian developer

Although I'm not a "gamer", I enjoy playing computer games from time to time. First-person shooters are especially well-suited for relaxing after a long and exhausting day ;-)

IMHO a very good choice, if you're looking for a fun Free Software first-person shooter running on Linux, is Nexuiz.

Nexuiz

• is GPL'd (and not only the code, but also the data!)
• is based on the Darkplaces engine, which in turn is based on the Quake engine
• should be packaged for Debian sooner or later
• has an unpronouncable name, which is always a bonus ;-)

Nexuiz version 1.5 has recently been released, which features new maps, new characters, better AI and lots more. Check it out!