Which westward route used by 400,000 American settlers to traverse the country in the 19th century became a popular computer game well over a century later?

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The Oregon Trail took 400,000 American settlers through the Western frontier from 1811 to 1850. About 120 years after the trail's use waned, it became an educational computer game that was immensely popular with schoolchildren throughout the country. The game allowed students to test their 19th century survival skills for 2,000 virtual miles until they reached the Williamette Valley.

Which Westward Route Used by 400,000 American Settlers to Traverse