However, curious nightmares plague the minds of the people on the ship every night. Rumors circulate about dark shapes following far behind the ship just below the waves. And tensions rise when a body is discovered in the ship's chapel, with signs of a strange ritual around the corpse. This journey began like any other, but now it seems that the ship may never reach its destination.

Find yourself among the passengers and crew of the SS Atlantica in this game of hidden loyalty, intrigue, and paranoia for three to six players. Some players are humans fighting for the survival of the ship, while others are traitors sent onto the ship by mysterious beings to ensure it never reaches port! Because players' loyalties are hidden, determining who is friend and who is foe is critical to winning in Unfathomable!