Sleuth

In Sleuth, a classic deduction game from master designer Sid Sackson originally released as part of the 3M Gamette Series, players are searching for a hidden gem, one of 36 gem cards hidden before the start of the game.

The remainder of this gem deck – with each card showing 1-3 diamonds, pearls or opals in one of four colors – is distributed evenly among the players, with any remaining cards laid face up. Thus, you and everyone else starts with some information about what's not missing.