Hi there! DSD is what's called a Prisoner's Dilemma setup, something that hasn't been made competitive in a long time. http://wiki.epicmafia.com/index.php?title=Prisoner's_Dilemma for more information! It looks pretty simple for the Spy and Killer to stay alive right through to end game but here's something that quite a few people don't actually know: If the remaining 3 players on lylo are spy/killer/town the game isn't quite over yet. Will the Spy and Killer work together or backstab? This set is my attempt to make a balanced and potentially competitive small but interesting setup.