Global Wasteland: Shelter Unlimited Upgrade

As the apocalypse arrived, the entire population transmigrated to the wasteland world, facing the deadly challenge of survival! Terrifying acid rain, torrential floods, city-burning firestorms, global glaciers, and super radiation... No one could escape! To survive, humanity could only build shelters and endure waves of natural disasters. Fortunately, Su Mo awakened the doomsday survival system! His shelter could actually upgrade infinitely! [Wooden Door] → [Iron Door] → [Alloy Door] → [Wooden Spear] → [Beech Spear] → [Electromagnetic Spear] → [Diesel Generator] → [Biological Generator] → [Thermoelectric Generator]... When everyone was busy preparing for the next disaster, Su Mo was fully equipped, rampaging in the wasteland world. "We're still using oil lamps, and they're already using refrigerators!" "I heard his shelter walls...