Must own 360 games.

Rockband.Its always fun to play when you have friends or people over and even for some parties.Its always something that can entertain you and maybe you might get some laughs in because of your friends being so bad.

thanks for sharing,some games i dont know,it must worth to play?

Yeah.. Halo 3 deserves to be there :) Umm.. Hitman: Blood Money should be there it cool!

A very overlooked game in my opinion is "Dark Sector"...Wow, such an intense game...I've read reviews where people complain that it's basically a Gears of War ripoff, but that's probably one of the biggest reasons I love it...Gameplay wise, it's quite similar to GoW, but with a crazy Sci-Fi twist on it...You gain powers as you go through the game, each cooler than the last...Plus you gain these powers every 10-20 minutes which makes it a hard game to get bored of...The online gameplay isn't anything too special, but it's still definatly worth playing...I highly recommend this game to anyone who heard bad reviews, it's a great game... -Mike P.S. Add me to Xbox live if you already have this game and want to play Gamertag - Deathbox Mnemic Thanks

I have Assassin's Creed and I think you need to add this game to the list no you MUST add this game

Call of duty 4 and halo 3 are big must haves if you have a 360 and newly released rock band is a very big hit

i have bioshock i have a bad halo three copy i do not have lost odyssey i have a bad copy of mass effect i have grand theft auto four i have call of duty four and i passed it already in normal mode i have the orange box and finally i have gears of war.

Rainbow Six Vegas 2 - I am such an addict of this game. I absolutely love it. Army of Two - despite the bad reviews it got, I've really enjoyed playing it. I love the characters, I played as Salem. Marvel Ultimate Alliance is fantastic, especially if you're a comic book fan like me!