Parker Brothers is the main board game division of Hasbro, formerly 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, 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. However, in 2017, Hasbro revived the brand with the release of several new games which bear similarities with those of some of its previous, better-known products.