Sweet game, not run of the mill as far as FPS games.
The view perspective is always first person, even during cutscenes. It makes you feel very connected and surrounded by the world this game presents.
The story is pretty good and keeps you going the whole time.
The graphics are flat out amazing. I haven't seen better FPS graphics on the xBox except for Doom. But this game is much brighter than Doom of course. Well, Killzone had pretty good graphics too though. Either way, damn good.
The gameplay isn't just run and gun. Setting traps is cool and playing off the provided instincts is easy to do yet quite fun.
If you own and xBox and like First Person style games, you gotta play this one. Easily worth a rent, buy it if you can play online. I can't play online, so I rented it, but if I could play online, I'd definitely buy it cause I'd be playing it a lot more.