Apocalypse: Reborn with a Dungeon from the Start

Opening note: [Farming + System + Mecha + No Female Lead]

A thick fog rolled in. Strange purple shock waves brought an eerie apocalypse in the wake of a violent impact.

Swift-moving Infected, mutated beasts, terrifying alien life-forms... Humanity no longer ruled the surface.

Ye Feng sold off his property to stock up on supplies, then acquired an underground city capable of saving human civilization. He gathered resources, built facilities, and continued unlocking the underground city's technology...

Ten thousand meters above ground, a colossal Leviathan was torn apart by a Skyfire mecha. In the endless depths of the sea, a ten-thousand-meter-long space battleship declared humanity's sovereignty. Turrets rose across the dangerous surface. Driven underground, humanity would return to the surface once more.