Amuck!
The Big One hit¸ WWIII. Out of the wreckage of the Earth came the survivors. Humans who had maintained the purity of the species. Formally Human mutants who did not gain strange abilities but just got uglier and tougher. Android servants now on their own¸ finally free of sub-servitude. All foraging through a strange new world still fighting for survival. Amuck is just a framework for weird post apocalyptic adventures. It can live in its own world or become your favorite post apocalyptic movie or Saturday morning cartoon show(ahem). Add to it¸ subtract from it but mainly just have fun with it.