ok alright... look im still a newbie to modding and stuff and even i can tell you that halo can NEVER be polayed on xbox there is no phisical way! unless you somehow installed a big ass hdd on the gba but i doubt thats even possible , and i dont think yuv even showed the cratridge or nothing like everyone has asked as proof do you think everyone here are dumbasses? GBA WILL NEVER PLAY HALO! it has no harddrive no way of storing anything it would need to even start up the damn game! its to huge of a game! the only real way wed see halo on gba would be if someone made a simple little homberew rom or something wich would prolly turn out like duke nukem advance, so stop trying no one will ever belive you.