Dead Island: Epidemic - Going to come out and say it, not a GREAT game, but i'd had some fun sinking a few hours with my friends. It's not quite survival ...really, kind of horde mode PvE, and 4v4v4 moba zombie theme PvP. Ofc there is rpg elements where you upgrade and craft weapons, although very basic. If you can get your hands on a beta key might be worth a peek while you're looking for that game.
(Shame though last weekend it was open access to all :'( )