Down Below

Concept: “‘I need a hardy group to check the district’s Drainage Works beneath the city.’”
Content: An elaborate sewer crawl filled with NPCs, plenty of treasures, and even more hazards
Writing: Includes lots of atmosphere and characterful monologues/dialogue for NPCs
Art/design: Optimized for clarity and quick navigation and reference
Usability: Provides plenty of details, clues, and dialogue for the GM to use or adapt; a potentially long adventure