Demon Hunters Role Playing Game (2008, based on the films Demon Hunters and Demon Hunters: Dead Camper Lake by Dead Gentlemen Productions)
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Due to licensing issues they couldn't use any of the characters that appeared exclusively in the television series Firefly.
Margaret Thatcher | Big Finish Productions | Margaret Atwood | Margaret | Margaret Mead | Hammer Film Productions | Princess Margaret, Countess of Snowdon | Margaret Weis | Princess Margaret | Margaret Cho | Princess Margaret Hospital | Charlie Weis | Margaret Mitchell | Tiger Aspect Productions | Margaret Bourke-White | Margaret of Anjou | Margaret Court | Margaret Becker | Margaret Sullavan | Margaret Hodge | Bob and Margaret | Margaret Murray | Baby Cow Productions | Margaret Tudor | Margaret the Virgin | Margaret of York | Margaret of Austria | Margaret Laurence | Margaret Island | Lady Margaret Boat Club |
Her newest company, Margaret Weis Productions, Ltd, publishes RPG line based on several licenses including Serenity and Battlestar Galactica as well as Ed Greenwood's new solo venture into roleplaying, Castlemourn.