Earth is different now. An unknown epidemic nearly wiped out humanity, dooming it to an eternal struggle for survival. Almost the entire population was turned into bloodthirsty zombies.
The apocalypse struck and cities were overrun with the walking dead. The military dropped nuclear bombs in the most infected areas, but it was too late. The epidemic was out of control. All hope was lost.
People fled their cities to find shelter from the walking dead.
They started building shelters to survive their last days in the new post-apocalyptic landscape.
Fight. Gather resources. Build your shelter. Survive!