Wretched Earth

"A Virulent strain of a predark biowep has been unleashed upon the denizens of northern Kansas, turning them into rotting, flesh-eating monsters. Running from the mindless, soulless rottie hordes, Ryan and his companions arrive in the civil-war-torn ville of Sweetwater Junction. They've got one shot at beating the hungry rotties: turn the blooklust of the ville's warring factions away from each other and toward a commone enemy." — quoted from back cover product description copy.