You have the good and bad animals, the beautiful terrains, lakes and rivers, and zombies. But absolutely nothing made by man. No weapons, no cars, no buildings, no roads, except any of the mentioned that you can craft yourself by hand or by forge using only natural resources. This would be a very fun mode, ecspecially in multiplayer where everyone would actually have to build their own shelter instead of just being lazy and using an existing one. We could forge bottles from sand for water beings there wouldn't be any bottles to find or windows to melt down, but other than that, it would just involve pulling some things from the game, which in turn could create more room in this specific mode for some of the different kinds of zombies and animals that the PC players get to have. Just a thought, thanks for your time.