First game on a 5 1/4 in. floppy that I finished. Not sure that it was a popular game but I thought it was pretty amazing in the before times. Would be interesting to see if this game could be brought to the modern era in some fashion. For me at least, one of the best early gaming experiences.
This was a game that you had to keep notes in the instruction book or a separate note pad to keep track of the things you learn through game progress and in multiple playthroughs. No progress saving, was a one run through kind of game.