Episode 199 is about a sneaky little PnP game not found on BGG.. not exactly anyway.  This is a legacy version of the game Ada Lovelace: Consulting Mathematician (which is on BGG).  Julius found out about this game and goes through the legacy experience.  Note, there is every the slightest spoiler in this, but this game doesn't have a lot to spoil.  Check it out.. it sounds interesting!
 
Ada Lovelace: Legacy of the Analytical Engine (Designer's site, payhip, itchio)
Ada Lovelace: Consulting Mathematician (BGG)