This is the definitive port of The Ur-Quan Masters to the GP2X. It is believed to be quite stable (no crashes have ever been reported by users so far and your author has neither ever had a crash.) It runs at full speed in almost every situation at 200mhz, except on planets with ridiculous tectonic or weather activity, but even then it is near full-speed.

Ur-Quan Masters is an open source port of Star Control II.

http://archive.gp2x.de/cgi-bin/cfiles.cgi?0,0,0,0,29,2390