http://www.strategyinformer.com/xbox360/deadisland/612/preview.html
Communication is key, as it's quite easy to lose your team mates and find yourself alone with several people trying to eat your brains.Team-mates can heal each other if they have med-packs, especially if they've been knocked to the ground, but again that's dependant on you being well stocked and finding enough supplies. It's also key as, even though there's no official friendly fire mechanic, explosions can affect everyone. Chuck an explosive at an enemy and if you're friends are too close, they die as well, so be careful.