In 1971, three student-teachers in the Minneapolis public school system created the computer game The Oregon Trail for students in their American history class. In this game, players could imagine they were journeying from Missouri westward to the Pacific Ocean, in search of better lives. They had to manage supplies, battle illness and foul weather, and hunt for food to continue along the Trail. Working with rudimentary text-based computer interfaces, they typed “BANG” to hunt and answered questions—“Do you want …