Abuse has been ported to GP2x by Senor Quack (Dan Silsby).

Abuse is a famous side-scrolling run and gun game originally released for DOS and Linux in 1996. It features beautiful pixel art, lighting effects, many weapons, and is a real challenge even on normal difficulty.

http://archive.gp2x.de/cgi-bin/cfiles.cgi?0,0,0,0,35,2677