On that note, I recently had an idea for a role-playing scenario that might make for an interesting campaign with some recurring characters in a series of games. Not sure what game system I would use. It would take place in a post-apocalyptic world trying to rebuild societies after a massive destruction of life and infrastructure. There would be mutations, of course, mostly unpleasant ones but some beneficial ones, including at least some of the heros (the players). I may put a bit more thought and work into it and see if it would be a viable effort.