Dead Island is a co-op game. It's not really any better than L4D if you're playing single player.
If you have friends to co-op it, it's a lot of fun, otherwise, not really a great game.
“Anna, my strong, terrifying Anna.” -Cas
"You lack the testicular fortitude to study under me" -Elodin
“slow and drunk is no match for fast and scared shitless.”-Jacob