The Cortex System is a generic RPG system based on the "Sovereign Stone System ", and was developed by Margaret Weis Productions, Ltd for the Serenity Role Playing Game, a science fiction role-playing game released in which year, and set in the universe of the movie "Serenity"?
2005
Title: Serenity Role Playing Game
Passage: Serenity Role Playing Game is a science fiction role-playing game released in 2005 and set in the universe of the movie "Serenity".  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 and Margaret Weis' license came to an end on January 31, 2011.
Title: Things Don't Go Smooth
Passage: Things Don't Go Smooth is the third title published for Margaret Weis Productions, Ltd's "Firefly Role-Playing Game".  It utilizes the Cortex Plus system.
Title: Cortex System
Passage: The Cortex System is a generic RPG system based on the "Sovereign Stone System ", and was developed by Margaret Weis Productions, Ltd for the Serenity Role Playing Game.  It was subsequently used for their licensed "Battlestar Galactica" and Supernatural RPGs, and brought out as a stand-alone system in the "Cortex System Role Playing Game" book (also called the "Cortex Classic System Role Playing Game").  Serenity, using the Cortex System, was the 2005 Origins Award Gamer's Choice Role Playing Game of the Year.
Cortex System Serenity Role Playing Game