Other History Lessons posts can be found here. In this case, you should read the History Lesson posts about DROD: King Dugan’s Dungeon and DROD: Journey To Rooted Hold in particular before proceeding. Lastly, as always, you may click on images to view larger versions.
DROD: The City Beneath is the game I thought I was getting when I first played Journey To Rooted Hold. Back then I expected a story-driven puzzle game, only to be confounded by its rigid 25-floor structure, in which every room of every floor must be cleared even if it had nothing to do with protagonist Beethro Budkin’s mission. It wasn’t until I started the DROD series from the beginning that it finally clicked, and I completed Journey To Rooted Hold — even its crushingly difficult later levels — eager to see what came next.