Open Source 3D Games

[Josh Charles]

I haven't been much of a gamer, but I recently purchased Allied
Assault and have become quite addicted to it.  I was amazed to find
that there are completely open source FPS out there, though from what
I understand, the quality isn't up to current proprietary standards. 
>From what I can see of the movies, though, the gameplay isn't too bad.
 Here are some links to check out if you are interested:

http://www.nexuiz.com/ - a FPS
http://www.planeshift.it/ - More of a RPG than a FPS, but looks neat.

Enjoy!
Josh