Christopher Crawford (born 1950) is a computer game designer and writer.
 He designed and programmed several important computer games in the 1980s, including "Eastern Front (1941)" and "Balance of Power".
 Among developers he became known for his passionate advocacy of game design as an art form, founding both "The Journal of Computer Game Design" and the Computer Game Developers Conference (now called the Game Developers Conference).
 In 1992 Crawford withdrew from commercial game development and began experimenting with ideas for a next generation interactive storytelling system.
Robyn Charles Miller (born August 6, 1966) is the co-founder of Cyan Worlds (originally Cyan) with brother Rand Miller.
 He served as co-designer of the popular computer game "Myst", which held the title of best-selling computer game from its release in 1993 until the release of The Sims nine years later.
 He also co-directed and co-lead designed the sequel to "Myst", "Riven", which was the best-selling computer game of its year of release, 1997.
 Miller composed and performed the soundtracks to both games.
 He also acted in Myst, portraying one of the antagonists, Sirrus (with brother and Cyan-cofounder Rand appearing as Achenar and Atrus).
 He co-wrote the first Myst novel, "The Book of Atrus".
Amazon Trail 3rd Edition: Rainforest Adventures is a 1998 game based on the video game "The Oregon Trail".
 It is not a true sequel to the franchise, but is rather largely the same game as "Amazon Trail II," only with updated graphics and interfaces and fixing major bugs that caused problems in the second game.
 The game is published by The Learning Company.
The Oregon Trail 3rd Edition (full title: The Oregon Trail 3rd Edition: Pioneer Adventures) is the second sequel to the 1982 edutainment video game "The Oregon Trail" after "Oregon Trail II".
 It was developed by MECC and released on Dec 31, 1997.
The Oregon Trail is a computer game originally developed by Don Rawitsch, Bill Heinemann, and Paul Dillenberger in 1971 and produced by the Minnesota Educational Computing Consortium (MECC) in 1974.
 The original game was designed to teach school children about the realities of 19th-century pioneer life on the Oregon Trail.
 The player assumes the role of a wagon leader guiding a party of settlers from Independence, Missouri, to Oregon's Willamette Valley via a covered wagon in 1848.
MayaQuest: The Mystery Trail (also known as "MayaQuest Trail") is an educational computer game created by MECC and inspired by the actual MayaQuest Expedition.
 It is a spin-off title "The Oregon Trail" series, featuring the lands of Mexico where the Mayan People once lived.
 While travelling across the lands by bicycle, the player learns all about the ancient culture and history of the indigenous people.
 The game also contains some Spanish language for additional learning.
The Amazon Trail is an educational computer game created by MECC.
 It was inspired by the popularity of "The Oregon Trail", featuring the areas surrounding the Amazon River and some of its tributaries.
 In this 2-D adventure, the player is asked to set out on a journey up the Amazon, hoping to make it to the lost Inca village of Vilcabamba.
 Along the way, the player learns about the people who live on and use the river for their survival.
 "The Amazon Trail" is known for being significantly more difficult than its predecessors in the franchise, such as "The Oregon Trail".
 There are two sequels, "Amazon Trail II" and "Amazon Trail 3rd Edition".
 It was released in 1994.
Computer Game Review was a print monthly magazine covering both computer gaming, and at the time upper end video gaming.
 The magazine was started in 1991.
 Also known as Computer Game Review and 16-Bit Entertainment, and then later as Computer Game Review and CD-Rom Entertainment.
 The headquarters of the magazine which was part of Sendai Publication Group was in Lombard, Illinois.
Amazon Trail II is a simulation video game developed by The Adventure Company and published by MECC for the Macintosh and Windows.
 It was released in September 1996.
 The game is a spin-off of "The Oregon Trail".
Oregon Trail II is an educational video game released by MECC in 1995.
 It was published by SoftKey Multimedia.
 It is a revised version of the original "Oregon Trail" computer game.
 It was redesigned with the help of American Studies PhD Wayne Studer.
 In contrast to the original version of the game, "Oregon Trail II" made an effort to include greater roles for women and racial minorities.

Question: Who is the producer of the  computer game who's spin-off of  is the  Amazon Trail II?
Answer: Minnesota Educational Computing Consortium