I want to add my support for an episode on pretty much any roguelike. NetHack and the Epyx release of Rogue in particular are ones I’ve spent time with. Rogue itself would make sense for its influence on later games, but the mechanical depth of NetHack would ensure that every participant has their own unique silly YASD stories.
I played some Dungeon Crawl briefly long ago the and some DCSS more recently. It’s my understanding that DCSS isn’t just a “better Crawl” but a significant departure in terms of design goals, so I think Dungeon Crawl may be interesting in its own right.
It could also be fun to cover some “proto-roguelike”. I’ve heard some say that Beneath Apple Manor is very rogue-like, and I learned just now that it had a PC release.