Become a God in the Next Second

We won against natural disasters, but lost to human nature. After the disaster, the world is gasping for breath in the ruins. Using weapons left over from the previous generation and declining technology, the crumbling civilization is barely maintained. The world outside the wall no longer belongs to humans. Twisted alien creatures are rampant, and radiation storms sweep across the earth. This is the iron law of the new era, an era in which humans are no longer the masters of the world.