The world has spiraled down into an apocalypse. The Cataclysm: The sun's extreme heat has forced humanity into a nocturnal lockdown. The Visitors: Visitors Creepy, pale monsters crawl out from underground habitats. They perfectly mimic human appearance and behaviors but can be identified by absurd, shifting criteria broadcasted by a bumbling FEMA (e.g., abnormally white teeth, dirt under the nails, hairless armpits, blood shot eyes, blurry appearance in photos, and bleeding gums). Visitors may have rapid pupil movement, skin irritation, or strange, aggressive dialogue that betrays their human facade. The Conspiracy: FEMA's guidelines are largely unreliable, and rumors suggest the government uses the crisis to conduct grotesque human experiments. Some fan theories suggest the Visitors are humans who evolved to survive underground, or even an eldritch fungal hivemind.