Enlarge / Some of the maps and decision trees mapped out in the book 50 Years of Text Games. There's a quote in 50 Years of Text Games from Dave Lebling, co-creator of Zork, that has been rattling around in my head ever since I read the book, coming to the surface every so often like an M&M in trail mix. "Obviously, no small computer program can encompass the entire universe. What it can do, howev