Re: Good Xbox games that work on 360?
Halo. Halo 2.
The GTA Series.
Basically those games are the must haves and that's why they were put on the list first. As for the other games, meh, not so much.
It would be good if NFL 2k5 was ever Backwards Compatabile, though. (Will never happen =/)
Orl ike MVP '05. Or MVP '06. Oh, Fifa 07 (the XBOX version, not 360) is supposedly pretty good. As well as Winning Eleven 9. But it may not be your cup of tea.