Thank you for pointing that out; I had read the Creative Computing article with the (I think CDC) BASIC source code for Oregon Trail, but didn't realize that this is the issue.

This is exactly the same time as David Ahl (founder of Creative Computing)'s monumental BASIC Computer Games book. While that book was the single most important source of source code for the earliest personal computer BASIC game programmers, another important resource was articles like this one. BYTE printed source code for important early type-in programs like Star Trek and Hunt the Wumpus into the early 1980s, too.