Parker Brothers was an American toy and game manufacturer which in 1991 became a brand of Hasbro. More than 1,800 games were published under the Parker Brothers name since 1883. Among its products were Monopoly, Clue (licensed from the British publisher and known as Cluedo outside of North America), Sorry!, Risk, Trivial Pursuit, Ouija, Aggravation, Bop It, and Probe. The trade name became defunct with former products being marketed under the "Hasbro Gaming" label.