Fallout 3 by far. Don't get me wrong Gears 2 is an awesome game ,but compared to fallout ,it's garbage. Honestly I love them both and want them both for Christmas, but Fallout is awesomer! Why?, well fallout it's has some similar dynamics to oblivion *hint made by makers of oblivion* and that lets you react with the real world making it way more than a first person shooter, but a whole new genre.
i cant decide i love them both fallout 3 when i feel like it and gears for somthing fast paces o and tommyx this post has nothing to do with resitance 2 since that is a ps3 game and we are talking about the 360 because gears is 360 exclusive