Robotropolis is Robotnik's territory. A great place to live, if you're a robot. It might as well be if you get captured by SWATbots. It was once Mobotropolis ten years ago. A vast city of both technology and pollution, Robotropolis is nothing but factories, warehouses and mining facilities. At the heart of this city of evil lies Robotnik's headquarters, which used to be Castle Acorn. It is uncertain if Robotropolis can be restored to it's former glory, but the Freedom Fighters will do what it takes to make it happen.