well you already have Halo which is must have for any X-Box owner, as far as GTA on X-Box I think PS2 has exclusive rights to that title, but if you're lookin for sumthin similar you gotta cop Dead to Rights droppin th 21st of this month. If you like sports MLB Slugfest drops this month as well, it's NFL Blitz MLB style. Games that are out right now either buy them or rent them to see which ones you like. Babbages, GameStop, etc.., give you 7 days to return games back for a cash refund, store credit, or an exchange. Microsoft says there will be at least 200-300 games out by the spring, well see. Be on the look out for games like Mortal Kombat: Dealy Alliance, Metal Gear Solid 2: Substance, Ninja Gaiden, Splinter Cell, Wolverine, Blade 2, Blood Rayne, Shenmue 2 like homeboy^ said, too much to name but you get the idea.
here are some screen and video shots for Dead to Rights
http://mediaviewer.ign.com/ignMedia...er&pagetype=article&page_title=Dead to Rights
I'm Outty-6!!!!!!!!!!!!!!!!