No prob.
You can find( I think) A few RPG games on Xbox live Market place. I dont know for sure though.
I have played a good many of RPG games, and Xbox ones are lacking.
I stick to the emulators for RPG related games.
But if you liek action RPG games, then Fable 2, Fallout 3, and Oblivion, are all good games. I have them all and have poured many hours into all of them(mostly Oblivion.)
If your interested in the classic traditional RPG games, then either get a PS2 or I will help you set up an emulator.