Woogal Posted this news on his site:
Quake 2
31/10/05 Got bored and decided to try a quick port of sdlquake2. It works, but a little too slow at the minute to be playable (5.5fps average with full detail and sound, 6.4fps with an autoexec.cfg optimised for speed). Will probably need to be coded directly against hardware instead of using linux as there isn't really enough memory available.
http://gp2x.sector808.org/quake2.php