Crystal Quest was a legit all-time classic game. I remain amazed that, nearly 40 years after I first played it, nothing else has ever reproduced its precise control mechanics.

It's already 25 years or so ago but in the early 20-teens I fixed up a Mac Classic II and got it online on the Internet, running both System 6 and MacOS 7.6.1, both fully tricked out with every possible enhancement. A great learning and revision exercise, and still a lovely OS to work with in the 21st century.

But the most fun I had on it was playing CQ...