Mystery of the Abbey is a whodunit deduction game in the spirit of Clue. A monk has been murdered in a medieval French Abbey. Players maneuver their way through the Abbey examining clues and questioning each other to find out who is the culprit.

Monks are of three orders; fat-thin; bald-hatted; bearded-clean shaven. One monk card is hidden; and the rest of the cards are distributed. Turns consist of moving up to two spaces; and then asking a question of any other monks who are present there. (For instance; how many fat monks do you have?.) Players may either take a vow of silence or answer truthfully; they then in turn get to ask the accuser a question. Mass occurs every four turns: all players go back to the Sanctuary; an event card is read; and they then pass an ever growing number of cards to their left neighbor. Various rooms have special events or cards associated with them; e.g. in a Cell you get to pick a card from a neighbor; in the Cryptorum you get to pick up a card to take an extra turn later. Unlike Clue you don't automatically win by making a correct Accusation: you get 4 points for getting it right; but you also get 2 points for each correct Declaration of a single trait; and lose points for incorrect declarations and accusations. So; e.g. a person could correctly Declare the culprit but lose the game. Unique Events cards add randomness to each play; and the game begs for House rules to limit the questions.