Last Armageddon

The humans who breathed the toxin-filled air on the Earth's surface became one with the Earth and kept dissolving. The history of humanity ended and dominion of the planet returned to the demons. These mutant creatures did not depend on oxygen to survive. Therefore, they were able to breathe the air and use the land.Meanwhile, an army of robots wage World War IV against the demons in order to conquer what is now known as Makai - the Demon World. These robots came to the plane