Bioshock or Gears of War!!!

Bioshock because the replay value is high and on a personal level because i have good times with this game, plus it is game of the year for 2007. Theres no bias here, I play gears of war more than Bioshock, but a game like Bioshock comes only once in a while!

bioshock is the best cause it is so awsome,fun,first person shooter game ever it is so coool (and bloody.)

Well int he overall history of video games there have been better than both, but just between these two BIOSHOCK is hands down the best. The opening moments alone were movie worthy and actually it is being made into a movie: http://www.associatedcontent.com/article/758557/xbox_360_video_game_bioshock_gets_a.html?cat=19

gears of war indeed!!! n thats y its been awarded so many great awards besides the best game of 2006

Neither of those are the greatest game ever... The greatest game ever is MASS EFFECT.

For me, Bioshock is just like any other first-person-shooter with new kinds of weapons and a very dark storyline. I prefer Gears of War because of its cool moves and third-person view. Using the chainsaw to kill your enemy is the best and blood droplets on the screen is an awesome effect!

I wish I had both of those games. If I get an xbox 360 I will get them both. Gears of War looks like it has cool action scenes/weapons and is really violent and Bioshock looks kind of like a dream, I like the monsters and that it's under water. I never really like first person shooters but Bioshock looks really good. I liked both games the moment I saw the commercials for them and they both have awesome graphics. But right now I really want to play Bioshock!

gears of war is the best game of xbox 360, but Bioshock is great, it hasn´t the quality of gears of wars

hmm.. didn't hear about gears of war but i'm totally excited about bioshock. Looks like a really great game.

i Will say bioshock out of those two but now there are eve better games on the way!!