Callistorsquos brilliant design including a board that changes surface according to the number of players present is among one of the features that make this game so unique while the goal is simplendashto be the first player to place all of hisher tiles onto the board the shapes of the tiles and additional columns make winning quite tricky the game plays out like a competitive puzzle and finesse and cunning are required to triumph ages 7 players 2 4 playing time 15 minutes