In 21XX, due to global warming, most of the North Pole melted and unknown microorganisms spread around the world. One of the microorganisms spread a highly contagious virus, causing a fatal disease in humans. This disease erased people's reason and turned them like zombies... You must find survivors with special weapons to form your team, search for hidden supplies and artifacts, and survive to the end. [ Let's join colleagues! ] As you explore the map or complete achievements, you can meet