Serenity

Serenity Role Playing Game is a science fiction tabletop role-playing game released in 2005 and set in the universe of the movie Serenity and the television series Firefly. It was produced by Margaret Weis Productions, Ltd, and its mechanics were the first iteration of the Cortex System. It won an Origins Award for Best RPG in 2005. Margaret Weis's license came to an end on January 31, 2011.