Extensive errata, to address unclear or indeterminate rules, are freely available. The first edition is no longer in print, and the second edition was released on October 5, 2010. A
Dungeons & Dragons themed version of the game, entitled ''Betrayal at Baldur's Gate'', was announced on June 3, 2017, and released on October 6, 2017. On November 17, 2017, a "
legacy" version of the game, titled
Betrayal Legacy, was announced for a Q4 2018 release, featuring a prologue and a thirteen-chapter story taking place over multiple decades. It was released on November 9, 2018. Avalon Hill released "Betrayal at Mystery Mansion", a
Scooby-Doo themed version of the game, on July 24, 2020. This variant includes 25 haunts based on episodes from the show, features faster playtimes than previous versions at 25–50 minutes, and has five playable characters: Scooby-Doo,
Fred Jones,
Daphne Blake,
Velma Dinkley, and
Norville "Shaggy" Rogers. Another notable change from previous entries in the Betrayal series is that players may volunteer to be the traitor instead of leaving it up to chance. On March 1, 2022, Avalon Hill announced a third edition of Betrayal at House on the Hill, releasing April 1, 2022 in Europe before being released to the rest of the world on August 1, 2022. This updated version streamlines gameplay, updates the core haunt mechanics, and adds 5 new scenarios, which give a starting reason for a player's involvement and can modify the Haunt. Expansions on this edition are expected to be seen "down the line" according to Chris Nadeau, a senior director and product development lead at Avalon Hill. ==Expansions==