This is a link to my favorite computer game. I liked it mainly because it was the first computer game I played (in about 1975) and also because, a few years later, I used to go caving. The cave system is very realistic and if you read the history, you will see why.
No one ever seems to have reproduced the Start Trek game where you got to shoot up Klingons.
I used to play these games on a teletype in a school friend’s front room. It was connected through to some DEC PDP 11 computers at his father’s work’s computing centre in Melbourne. Given the slowness of the teletypes, I would bet it was a 300 baud (bits per second) line.