Best co-op game on the 360

What co-op game or game series have you liked the best so far on the 360? A few months ago I would have said Gears of War, but I'm totally obsessed with the co-op of Borderlands now. It's highly addictive since it combines loot and skill trees with traditional frantic fps action.

Borderlands is easily my favorite because the enemies names alone just makes me love the game. Playing with a few friends while midgets come out of their little huts to just get a shotgun to the face never gets old.

Toss up between Boderlands and Left 4 Dead 1/2

l4d

it actually requires teamwork if you all want to survve

Call of Duty World at War - Nazi Zombies, this never gets old and seems to be the best co-op that I have found. Army of Two is pretty decent, though split-screen is a pain in the neck.

I went with Borderlands.

l4d

it actually requires teamwork if you all want to survve

krunkfu2

Exactly. Its not just another FPS game. It seriously is creative multiplayer game play/maps etc. Love it.

saints row 2 my friend