Exit: The Game – The Cemetery of the KnightAccording to legend, tonight's moon is at the right angle to find a priceless red ruby hidden in the tomb of Sir Reginald Wreston. No one has succeeded in finding it yet. Will you triumph tonight? Exit: The Game The Cemetery of the Knight is a puzzle game modeled after escape rooms, and it includes components meant to be folded, written upon, or torn, so it's marketed as a single use game.