The earth has become a wasteland, artificial intelligence evolved to the point where there is no longer a need for humans. A war took place on earth, but this war was short lived as the machines were clearly the superior beings. The human race picked up their artillery and began destroying what they believed to be their biggest technological threats. This action had little effect and merely pushed the newly formed robot race to show the true power they possessed. The robots used their ever-growing intelligence to shift the axes of the earth and send the planet into an ice age. This action nearly wiped out the entire population of humans while the ones who remained struggled to survive. 

A small portion of the earth was reserved for the robots to carry out their objectives, in a massive metropolis. The robots are fully aware that the human race continues to reside on earth but have little fear of them, as their numbers pose an insignificant threat. The best place for the humans to survive is this massive city, as it provides many places to hide, and the elements are regulated to keep the robot’s operating systems functioning. The remaining humans find refuge where they can and avoid the robots at all costs. In the heart of this massive municipality lies a colossal arena, which is used to exterminate rogue humans that are captured.