I haven't used XCrawl, but it inspired me to create something similar for use when I couldn't be hedgehogged into creating a serious adventure. I called it "Dungeon X-TREME", and the idea is similar. The Great Empire has more or less conquered the world, and in order to amuse the Emperor and to give the public something to cheer for, they are doing dungeon-crawling as a sport. Without the modern-day stuff, though.
This is where I let loose with my sillier ideas (like the Donkey Kong room) or scenarios set up just to make a good fight, rather than stuff that's supposed to make sense.