Just putting this here in case someone is interested.
Poking around some old disks I found something interesting: a transcript of a 1990 online conference featuring some big-name designers of classic adventure games. I have posted it to my blog: https://www.mindthec...compuserve-1990
Turns out a computer game historian posted an edited version of it earlier this year. His intro and footnotes are very good, but I think when he edited the discussion it lost some of the flavor. The participants joked around a lot and the edited version lacks a lot of it. But he's the historian so see his blog for the excellent intro and footnotes.