Global Cataclysm: The Ultimate Doomsday Shelter

Global disaster strikes, and the world enters the apocalypse!

A city surrounded by zombies?

Mutated insect swarms?

A beastly calamity?

An invasion from another world?

An age of eternal night?

No need to be afraid. I have an endlessly upgradeable, god-tier shelter!

No self-sacrificing saint, no fake goody-two-shoes, no tormenting the protagonist. You deserve this!

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.