Co-operation is the name of this game, as you struggle to reach a series of safe houses and eventual rescue, while all the time being assaulted by hundreds of zombies and other creatures. The five new campaigns (one more than the original) feature a more detailed story and finally explain how the outbreak occurred. If all you're interested in is the action though then there are new melee weapons - including a chainsaw - and lots of new firearms. With new mutant types as well this is t