Adventus ported ZDoom to GP2x, ZDoom is an enhanced port of the official DOOM source code.

Release notes:

– Due to its dependency on FMOD it doesn’t support sound at the moment.
– The performance is also not as good as the other Ports, for this reason i disabled transparencies…. which lead to some strange graphical glitches (a few flickering walls, nasty menu text, etc). However it is very playable in its current state. I will look to improve this.
– So far I’ve tested the Strife, Doom 1, Hexen & Heretic demos. Its up to you guys to test the rest. I suspect some of the more complicated mods might not be playable.
– Don’t forget to read 2xZdoom220.txt and go to the “customize controls” menu to set the controls for each game.
– Apart from fixing any bugs, i intend on improving the performance and supporting sound via Timidity and Mikimod.

http://www.gp32x.com/board/index.php?showtopic=43081