Question: Amazon Trail II is a spin-off of what game originally developed by Don Rawitsch, Bill Heinemann, and Paul Dillenberger in 1971
Context: 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. 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. Dark Ages is a MMORPG based on Celtic mythology, originally developed by Nexon and now operated by KRU Interactive.  It is loosely based on the Korean game "Legend of Darkness".  The American version was developed by David Ethan Kennerly who based it somewhat on the works of horror writer H. P. Lovecraft.  The game originally thrived on player involvement in the management of the game and progression of the storyline, even going so far as allowing players control over in-game politics and laws. Bomberman Live is a downloadable video game for the Xbox Live Arcade, developed by Backbone Entertainment.  "Bomberman Live" is an original version of the classic game "Bomberman", an arcade-style maze-based video game originally developed by Hudson Soft.  The game was announced on May 16, 2007 and released on July 18, 2007.  It is the first in a trilogy of downloadable Bomberman titles, later followed by "Bomberman Blast" and "Bomberman Ultra" for WiiWare and PlayStation Network respectively.  It saw a retail release as part of the 2009 Xbox Live Arcade Game Pack. 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". The Oregon Trail is a series of educational computer games that began with the very first edition 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. Galaxy Fight: Universal Warriors (ギャラクシーファイト ユニバーサル・ウォーリアーズ ) , or simply Galaxy Fight (ギャラクシーファイト ) , is a 1995 arcade fighting game originally developed and published by Sunsoft for the Neo-Geo MVS arcades.  It was Sunsoft's second fighting game after their 1994 Super Famicom spin-off of their "Hebereke series", "Sugoi Hebereke", as well as their first side-viewed 2D fighting game. 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. 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. 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.
Answer: The Oregon Trail