I love a good text adventure. Some of the first games I played were early 8-bit texties. Like radio vs. television, the pictures were a lot better, even when they consisted of early vector-built forests as well as whatever my imagination could conjure up. When I started programming, the first thing I wrote was a text adventure, and to this day, I think that the best way to get to grips with a new computer language is to do exactly that.
I'm sure lots of you out there remember the excellent DOS game Sleuth, which was written by Eric N. Miller in the 1980s. I absolutely loved it, and still play it at Christmas with the family. Unfortunately, it requires an emulator to run nowadays, which can be a bit fiddly.