Sociolotron
Sociolotron is a virtual world which has virtually no rules. Violence, sex of any persuasion, and even killing are condoned here. It features a detailed in-game economy which players to own houses, manage bars, run for public election, bring people to court for crimes, treat contagious diseases, and blackmail. There is a cult system based on blood magic or sexual practices, and a complete underworld for when you are killed and become a demon.