The Rise of the Doomsday Mecha

Nuclear war breaks out, doomsday comes, and all lives are devastated! After the war, the earth's environment was filled with devastating nuclear radiation, and human survival was in danger. However, what is even more terrifying is that beasts have mutated and evolved under the influence of nuclear radiation, and humans are teetering on the edge of extinction! Finally, with the rise of mechas, humans gradually broke through the captivity of alien beasts.