On the arcade consoles, I loved Joust, but I think Major Havoc was one of the best games I ever played.
When I first started working, back in the 1980s, I had an old CP/M machine and I played some sort of “Adventure” style game, similar to Zork. I was looking at the credits one day and realized I worked with one of the designers of the “Adventure” game (whatever it was called). Zork was a blast, too.
I used to play LARP on Unix computers, and at one time, was trying to port it to the IBM-PC.
On the IBM-PC, though, Leisure Suit Larry in the Land of the Lounge Lizards was flipping hilarious for its cheesy play and graphics. I also loved Leather Goddesses of Phobos.
Then, in the 1990s, I played The Incredible Machine at lunchtime at work. It was awesome!