Zombicide: Green Horde: New Zombies in Olden Times

The heroes of Zombicide: Green Horde had been surviving long before the plague hit. They lived on the Western frontier, at the border of Orcish lands. It was a wild country with forests and fields overgrown with green and crawling with Orcs. 

In the generations before the plague hit, they had come to know their enemy well. However, the familiarity they had developed is not going to help them when the Green Horde arrives.