From publisher blurb:
Over the course of several journeys, you've caught whispered references to a mysterious figure known as "DJ Ishkremshüz." In out of the way spots, you've seen graffiti of a stylized ice cream cone, and picked up DIY flyers advertising a secret, never-ending party.
You’ve asked around at back-alley tea shops and street-side record vendors. What you’ve discovered is that DJ Shooz is real, a legendary underground turntablist, and that he presides over a massive dance party so underground, it’s literally subterranean.
Ravin' Under Dark is a free, unofficial scenario for Ryuutama that takes travelers into a perilous underground world, developed through twenty encounters, which can be played, dropped, or randomly chosen at the GM's discretion. Also included are rules for managing illumination in the Underground, and several new monsters like the Üntergoblins -- a race of Nekogoblins endemic to this lightless world.