Question: Cortex System was developed for the role playing game released in what year?

Context articles: Beneath Apple Manor
Merpcon
Serenity Role Playing Game
Supernatural Role Playing Game
Reveal Fantasia
Online text-based role-playing game
The Aethra Chronicles
Cortex System
Marvel Heroic Roleplaying
Middle-earth Collectible Card Game

Beneath Apple Manor is an early roguelike game released by Don Worth for microcomputers, which had a Lo-Res Apple release in 1978 (through The Software Factory) and high-res multi-platform releases in 1982 and 1983 (through Quality Software).
 The goal is to obtain a Golden Apple on the bottom floor of the dungeon.
 There are 10 rooms per level in the low-res version, and 5 in the high-res version.
 The high-res versions may be played in low-res/text mode, thereby gaining this increase in level size.
 It is notable for being the first commercial role playing game developed and released for a home computer as opposed to a mainframe computer.
MerpCon is an acronym for "Middle-Earth Role Playing Convention", a role playing game convention dedicated solely to role-playing gaming in J.R.R. Tolkien's Middle-earth.
 The event is held annually on the last weekend of July and runs for 3 days from Friday, through to the end of Sunday (and sometimes a little into the following Monday morning).
 To date MerpCon has been held each year in Spokane, WA, USA.
 Beginning in 2009 MerpCon began to transition to being called Tolkienmoot as this convention's venue began to expand to include more Tolkien-related activities, events, and guests beyond just role playing in Middle-earth.
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.
The Supernatural Role Playing Game is a role-playing game by Margaret Weis Productions that was released in 2009.
 It is based on the television series "Supernatural" and was the final game to use the Cortex System.
Reveal Fantasia (リーヴェルファンタジア～マリエルと妖精物語～ , Riberu Fantajia Marieru to Yousei Monogatari ) Is a Fantasy role playing video game released in 2002 for the PlayStation 2 console by Victor Interactive Software, Inc. in Japan.
 The game involved an innovative concept of a role playing game involving no battles or fighting.
 Its game play shows some influence from dating simulation games.
 The game was never released outside Japan.
An online text-based role playing game is a role-playing game played online using a solely text-based interface.
 Online text-based role playing games date to 1978, with the creation of "MUD1", which began the MUD heritage that culminates in today's MMORPGs.
 Some online-text based role playing games are video games, but some are organized and played entirely by humans through text-based communication.
 Over the years, games have used TELNET, internet forums, IRC, email and social networking websites as their media.
The Aethra Chronicles - Volume One: Celystra's Bane or The Aethra Chronicles (also known as Aethra for short) is a classic 1994 MS-DOS shareware computer role playing game.
 The game was based on the Rolemaster game system, a Pencil & Paper role playing game.
 It was developed mostly as a one-man project by Michael Lawrence with some help from others for the graphics and sound/music.
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.
Marvel Heroic Roleplaying (MHRP), is the fourth role playing game set in the Marvel Universe, published Margaret Weis Productions under license from Marvel Comics.
 It was a fast playing game using the Cortex Plus system, with the first volume published in early 2012.
 In early 2013 Margaret Weis Productions announced they would not be renewing their license.
Middle-earth Collectible Card Game (MECCG) is a collectible card game released by Iron Crown Enterprises in late 1995.
 It is the first CCG based on J.R.R. Tolkien's fictional universe of Middle-earth, with added content from ICE's Middle-earth Role Playing Game.