Global Cataclysm: My Base Can Be Upgraded

When black fog descended across the globe, urban order collapsed within twelve hours. The architect Lin Mo had not awakened any powerful combat abilities, but he was bound to the Doomsday City System. Starting with an abandoned underground parking garage, he repaired the water supply, restored electricity, built walls, recruited people, set up factories, and defended the city. In the end, he established a new world for the survivors amid the ruins of the old civilization.