USer summary:
Serials - Ein Dark Reality Rollenspiel is a German RPG about serial killers, taking inspiration from Neil Gaiman's portraying of serial killers in his Sandman comic. The game's release caused a media outcry in Germany.
The game contains detailed decription of character traits, and assumes freeform play, but provides a mechanic for resolving issued when players cannot agree: A memory set (40 cards = 20 pairs showing historical serial killers) is provided, and the one who is able to complete a pair gets to decide on the matter at hand.