Apocalypse Descends: Infinite Shelter Upgrade

The apocalypse has arrived.

Extremely cold weather, extremely hot weather.

Earthquakes, acid rain, gales, and hail.

Flood monsters, virus zombies.

Sunspots, radiation particles.

Major disasters occur frequently, and the survival of all mankind is in grave danger.

Su Muchen built a family shelter for refuge and gained the ability to 'upgrade everything'.

In order to survive in the apocalypse, they used their abilities to gradually upgrade their shelter.

Reinforced concrete walls — cast iron walls — steel walls — alloy steel walls — titanium alloy walls

Generator—Biogenerator—Bioenergy Storage Device—Bioelectric Nuclear Energy

Robot — Intelligent AI Robot — Intelligent AI Robot — Super Intelligent AI Robot

Protective suits — exoskeleton armor — mechanical armor — small mechs — giant mechs

Brain development 20% — Brain development 50% — Brain development 80% — Brain development 100%

Cell activation 10% — Cell activation 30% — Cell activation 70% — Cell activation 100%

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Before anyone knew it, a technologically advanced, invincible, super-dimensional divine realm slowly rose up.