Santorini Riddle of the Sphinx Retail Board GameDescriptionSpecificationsShipping Santorini: The Riddle of the Sphinx is a co operative expansion for Santorini that adapts the competitive experience into an ongoing adventure that players navigate together. In this expansion comprised of a series of scenarios called "riddles", players will seek to complete tactical objectives to solve the riddles. However, if players exhaust their supply of Santorini tower pieces before an objective is completed,