The Zombies expansion to Good Cop Bad Cop removes player elimination and adds an immediate and growing threat from a third team, the Zombie team. One player will start the game as the Infector, who is the only person on the Zombie team. They will try to stay hidden as long as possible to seed the Zombie virus among the other players and maybe even create some additional Zombie teammates by eliminating non-Leader players. They win if they can turn the Agent or Kingpin into a zombie. The Honest and Crooked teams still have the same winning condition of eliminating the opposing leader, but they will have to do so while holding back the zombie horde. The new equipment to this expansion, like Chainsaw, Shotgun, and Machete, are the most deadly we've ever added. Use it carefully or you might end up creating more zombies! -description from publisher