After drawing an Omen card, the player rolls dice and, depending on the result (requirements differ between editions), the Haunt phase will start.
[6] 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.
[8][9] 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.
[14] 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.
[15] On April 20, 2016, it was announced that Betrayal at House on the Hill would receive its first expansion, entitled Widow's Walk, on October 14, 2016.
[17] The expansion was designed by Mike Selinker, who was a developer on the original game, as well as Elisa Teague and Liz Spain.
[21] Several notable figures contributed to the expansion including animator and writer Pendleton Ward, game developer Zoë Quinn, and Max Temkin of Cards Against Humanity.