After a string of contributions from scree, I returned yesterday with a game that ... in hindsight, I have no idea why I picked it in the first place. It was Silent Service, a submarine simulator from MicroProse in 1985. I remember playing a more modern version of it, but couldn't tell you why it came to my brain.
Unsurprisingly, nobody seems to have particularly strong memories of sub sims released 32 years ago. So to jog your memories a bit more effectively, here's another reader submission from Tri.