OpenTyrian is a port of the classic DOS game Tyrian to C using SDL, so it can run cross-platform without DOSBox. (Descriptin taken from http://code.google.com/p/opentyrian/ )

Changes:

* Non-fullscreen mode is now centered. See Title -> Opentyrian menu.
* ARM assembler sound mixer. Nice speed up, Pentium detail level is fully playable! Code is thanks to sweetlilmre and his efforts porting Tyrian to the Gizmondo.
* Improved controls within menus. No longer uncontrollably fast!
* Improved controls for accessing PAUSE and IN-GAME SETUP.
* GP2X specific readme-gp2x.txt providing instructions and setup.
* Redefinable fire keys. See Options -> Joystick menu.

This release is a full package! No additional files are required.

http://archive.gp2x.de/cgi-bin/cfiles.cgi?0,0,0,0,30,2433