From the box:Explore the more unusual side of history with the History's Mysteries Card Game. This 90-card deck features ten of the most well-known, yet unsolved, mysteries. Instructions for a rummy-like card game focus on making melds (three or more of a kind) and playing your cards as Fact or Fiction. Players try to outwit one another by deciding whether or not to challenge or support a mystery as it is played on the table. The majority rules at the end of the game and the player to reach 100 points or more first is the winner. Decide for yourself-is it Fact or Fiction?While not officially included, History's Mysteries Card Game is often considered part of the Mystery Rummy series. - BoardGameGeek