So my girlfriend is awesome and bought me an Xbox360 for my birthday last week. She also picked up CoD: Black Ops for me and I am lovin it.
I decided to purchase Gears of War 1 and 2 for a total of $8.00, which is awesome of course.
Any other games I should go back and play? I am obviously LTTP on this

Also, my live Gamertag is: Buffalo Dip
Just incase anyone wants to add me