Doomsday Fortress: My Infinite Upgrade System

The apocalypse arrives in seven days—and Qin Jian is ready. Transmigrated to a parallel world on the brink of extinction, he awakens the Doomsday Bunker System, transforming his shelter into an unstoppable fortress. Meteors rain from the sky, viruses mutate beyond control, and an eternal winter descends—but while humanity cowers in crumbling refuges, Qin Jian unlocks layer after layer of cutting-edge technology. Weapon forging, genetic enhancement, advanced aviation—his bunker evolves infinitely, turning survival into domination. As monsters besiege mega-shelters housing thousands, our fearles…