Mine would have to be Battlefield Bad Company.
I love the scale of the game, the pace and the fact that its not just a crazy shooter.
So many different ways to achieve your objective both in single player and online.
The game is awsome!!!

Gears 1, I was addicted to it

hands down, dead rising. I'd put it in my top 10 game sof all time. As a fan of well pretty much anything zombie related the game is a dream come true. I got all the achievements too, even the 7 day survivor one that requires you to play for 14 hours straight pretty much.

Probably Call of Duty 4, the multiplayer is just flawless and great fun to keep going back to, Civilization Revolution is another game that would definitely be in my top 10 games for the 360.

Rock band hands down.
 As for exclusives - Gears of War for sure!

Probably a toss up between CoD4 and Bioshock.

Bioshock, bought my xbox the day it came out and was blown away.

My favorite game on the xbox 360 must be Dead Rising, because the idea of surviving a zombie-invasion on a mall is great. I love George A. Romero's Dawn of the Dead and I keep The Zombie Survival-guide by Max Brooks next to my bed, so for me this is the perfect game.

GTAIV - Because it satisfies my need for gta

Dead Rising

Amped 3.  It's the most crazy sports game I've ever played due to the cutscenes and story and it a true hidden gem amongst the other sports games and 360 games on the market.  I wish there would be a sequel but the game was so crazy that the dev studio closed shortly after finishing the game.

This is a hard one.

"Gears 1, I was addicted to it"

"This is a hard one.

Shadowrun, Gears of War or Fifa 08 :)"

Gears of War, played trough the campaign about 10 times, one of the best co-op games out there and the mulitplayer is fun too, except for the "host-advantage".

sLux said:

"This is a hard one.

Shadowrun, Gears of War or Fifa 08 :)"

how did a sane person like you like shadow run
"

Mass Effect because I love RPG's and this is a great example of one.

Probably Mass Effect or Devil May Cry. I love those games.

cod4

CoD4.. campaign and multiplayer are just awesome.. and Mass Effect.. which is just another awesome bioware RPG

Halo 3, just because there is so much in it. I really liked Call of Duty 4 too, but Halo just has more. While I hate shooting at someone for an hour and then my teammate comes in to steal the kill, it's additional featurs make it better. Plus, everything about the game can be done online. The next Call of Duty should have an online cmpaign, that would be awesome!

Kameo...One of the most beautiful games this gen and i had tons of fun playing it

halo3, great online, good graphics, awsome weapons, great story. call halo 3 overrated but it sure was worth my $60

Call of Duty 4 probably, but Halo 3 and The Orange Box are pretty close.

It's gotta be Halo 3 for me, just the story and the MP was unmatched before. I still am hooked on it, its really fun.

360 exclusive? Has to be Mass Effect or Halo 3, maybe Gears, but I just didn't find it too appealing or addicting, not as much as ME anyways.

been awhile since i played it, but gears of war. i cant wait for gears2

Ninja Gaiden 2 and GTA IV.

COD4, played the hell out of that game when the beta came out and again when it was released. Have not played much of it lately though.

Halo 3 had the single player experience I was hoping for but COD4 has me coming back for multiplayer.

"Kameo...One of the most beautiful games this gen and i had tons of fun playing it
"

I would have to say Crackdown. I love the look of that game and being able to run and jump any where. I find it great fun.

Halo 3, especially when you get a good match going on live it's just such a nice game.

For single player, BioShock or the Orange Box, Co-op Gears of war, Multiplayer either Rainbow Six Vegas 1/2, or the Orange Box again.

Gears of War for sure.

Burnout Paradise it has an amazing replay value and awesome multilayer component.

Not an exclusive, but Rock Band.  I try to drum at least an hour everyday, and it never gets old.  If we're speaking strictly exclusives, then Mass Effect.  I've loved everything that Bioware has ever done, and they didn't disappoint with this RPG.  Many have put down the gameplay, but after 4 playthroughs I still love the game, and am contemplating another playthrough as I type this.

Dead Rising, must I say more? Zombies...lots of it.

Call of Duty 4. It's been 8 months since release and I'm still playing it!

I love to kill zombies but I thought dead rising was frustrating.  The time constraints and the bad save zones really got to me.  I'm sure the free play mode would have been  alright, but after one play through I was done.

BioShock. Best game of 2007.

I'm gonna say Skate was my favorite game so far.  It's been one of the only games that I've played in the past two years that introduced a new way to play.  I still love Halo 3, GTA 4, and COD4 but skate just brought something new to the genre. 

halo 3.......is that bad??

gears of war

ONLY 360 game? Mass Effect, then I guess Halo 3. The rest are multiplat.

Halo 3. The MP never gets stale for me.

Call of Duty 4: Modern Warfare, because the multiplayer is perhaps the best to date and the single player experience is so chaotic.

Three way tie :|
The Orange Box,Rainbow Six Vegas 1,and Oblivion

"Three way tie :|
The Orange Box,Rainbow Six Vegas 1,and Oblivion"

Oblivion.  It's a total life-stealer.

In fact, if someone doesn't hide my Oblivion disc, I might not actually get around to playing any other 360 games.

"McDazzle said:

"Three way tie :|
The Orange Box,Rainbow Six Vegas 1,and Oblivion"

R6V1!? Really? Lol, well if you're gonna pick a R6V game at all pick the second one. :P
"