In 2011, the Antarctic glaciers melted, releasing a large number of genetically mutated viruses, which led to genetic mutations among various species. This virus was airborne among arthropods, and the infected arthropods would actively attack the brains of other organisms and become parasitized, causing monsters to multiply and riots in human society. Powerful countries built doomsday bases one after another, and everyone went there one after another. Humans who did not arrive at the base could only resign themselves to their fate.
Purpose: Learn to survive in the apocalypse