Global Catastrophe: I Use Black Tech to Build a Super Shelter

He had transmigrated only half a month ago when the apocalypse arrived!

Li Tian stared at the red alert and nearly crushed the sofa. He'd just been planning to copy a novel and coast to an easy win, and now the world was about to end?

Luckily, he activated the Doomsday Black Tech System! He dug out a 4,000-square-meter underground shelter in six hours, welded the walls with shape-memory alloy, reinforced them with a space-expansion gun, and built a bunker that could withstand meteor impacts and nuclear fallout.

He unlocked a cloning pod that could produce three elite special forces soldiers a day. With a super 3D printer on hand, any missing parts could be printed in seconds!

After the meteor shower, the world froze over, radiation spread, and order collapsed. Li Tian and his clone squad stockpiled food and fuel, but while scavenging for supplies, they stumbled upon three sisters who were freezing to death.

Would he take them in and form a team, or guard his fortress alone? In the apocalypse, strength is what counts!