From the introduction to the ...Overworld sourcebook
Slade Stevens' ...Overworld is a campaign setting based on a dystopian future. The nations of the world have fallen, the ecosystems of the planet have been destroyed. All that is left are massive biospheres whose only purpose is to continue UNICorp’s commerce and productivity, even though there is no other corporation to compete against, and the only consumers are its own employees. Outside of these CorpStates, life has managed to continue, though it is primitive and brutal. There are myths and legends of a utopian society living beneath the surface of the barren earth, but many do not believe that such a place exists.
Will you be able to survive the harsh and desolate Overworld? Will you rise to godlike power within the ranks of UNICorp? Or will your adventures lead you down another path?
Find out what the future holds for you in Slade Stevens' ...Overworld.