Halo Zero is a fanmade game, a 2D, low-spec version of the famous Xbox game, Halo. Its not a commercial project and I am sure if the designer was E-mailed and told of your intentions, he would give the source code gladly. It may have already been done. Anyway, I am sure the GP2X could handle it, and I know some of you wouldn't mind having Halo in your pocket.
HaloZero
Edit:
It would have to be dumbed down a bit, after reading up on it, and playing it.
HaloZero
Edit:
It would have to be dumbed down a bit, after reading up on it, and playing it.