Mass Effect 2 and Lost Odyssey!!!

Maybe he just hasn't connected his 360 to his router.  I'm not familiar with the OP's posting history, but, as it stands now, I'm willing to give him the benefit of the doubt.

Depend what type of gamer you are
If your into RPG'S and JRPG then i would recommend Lost Oddsey, Mass Effect 1 + 2 (One of the best RPG This Generation!)

Honestly Mass Effect 2 is a must get even if you haven't played ME1
Look out for Alan wake, That game looks promising, Amazing Visuals and gameplay
Left 4 Dead 2 - A really fun game especially when you are playing online with someone random or a friend

Dead Rising
Mass Effect 1 & 2
Forza 3
Crackdown
Fable 2

Coming later this year
Alan Wake
Splinter Cell Conviction
Halo Reach
Fable 3
Crackdown 2

Here are the ones I have: {including console exclusives}

Ace Combat 6
Battlestations Pacific (wouldn't necessarily recommend this}
Fable II
Gears of War 1 & 2 {they are certainly the best exclusives on the system}
Infinite Undiscovery {don't get it}
Halo Wars
Lost Odyssey
Mass Effect 1 & 2
{I do have Halo 3, but I didn't buy it}

Oh, and the XBLA game Shadow Complex is one of the greatest games ever

The best games on Xbox 360 are

1. Too Human
2. Shadow Run

Dude thats just wrong

Millions of Xbox 360's were sold because of these two games.