Dead Rising! While I don't play it as much anymore, the wow factor of having hundreds of zombies on the screen at once never got old. It pulled off the zombie feeling perfectly. I didn't buy Halo 3 :P
Also Forza 2. The customizable option for cars alone make it a gear head's paradise. Like any racing game, there's enough depth to make it interesting for months and years if you want to dig that deep.
Now that the superior PC version of Gears is out I sold my 360 version, or it would have been #2 on my list, and since it's rumored Mass Effect will be coming out for PC, I'll wait till then and get the better version. I can wait a year, I hope. It looks amazing from what I've seen so far.
3rd Party Wall of Shame
http://www.nintendoworldreport.com/forums/index.php?topic=30478.msg581036#msg581036







