The zombies are based off from 28 days later, hence the "Day Z mod" On topic: If we where to integrate slow paces zombies there would have to be hundreds of them, I mean like each city would nee to include 400+ zombies. But some things that baffle me is that, Zombie in the house THEY WALK..... Even when there dead they can still hear there mother saying "DONT RUN IN THE HOUSE!!!!"