
Due to all the hard work Valve fans did a few weeks ago, they were able to unlock the Left 4 Dead 2:Dead Air DLC early.

Sometimes, we want to face the end of the world, and prevail. Perhaps it’s zombies, aliens or other people. There were a few excellent titles in the “Apocalypse” genre over the past couple of years. Bigger and smaller titles which might catch your attention. Perhaps you just want to try something different, or maybe you want to go mutant camping, without having to find real mutants yourself? Whichever the case, read on.

Great coop campaigns feature thoughtful narratives that support camaraderie and provide the experience of accomplishing objectives through teamwork. Joystick Division looks at the ten best coop campaigns of this generation.
I think gears and portal easily take the cake both become a better game with a buddy (not to say they are not the greatest games on their own).
Not a bad listing of games. But I would have changed Halo 3 to read Halo Series, because all the Halo Series that had co-op campaigns were exceptional with another player beside you.
I enjoyed Reach the best of the Co-op and then maybe Halo 3 and ODST. Though some complain that ODST didn't have matchmaking with campaign... not an issue for me seeing I hate playing campaign games with strangers.
Saint's Row 2, Resistance 2, Borderlands and Portal 2 were the most fun I had in co-op this gen.
Edit @ Legion below - Right. Co-oping in a different campaign isn't really campaign co-op. Airtight logic.

Valve continues to prove how awesome they are by announcing even more DLC for Left 4 Dead 2.
Any love for the first L4D...you know Valve the one you said was still importent and you would still update.
You would think by now in L4D2 since they have the original maps there would an option for classic mode without the added infected and Melee weapons
Should announce L4D2, with all DLC for 29.99 on PS3. Comes with Steamworks or wahtever :)
:)