World's Largest Dungeon, Book 4: Regions M-O

2026 · Scenario / Adventure / Module

World's Largest Dungeon, Book 4: Regions M-O

This 5E adventure book presents Regions M–O of a vast, interplanar megadungeon built as an ancient prison for dangerous monsters. Adventurers explore cursed corridors, face monsters and other hazards, uncover relics and lost power, and advance through a campaign designed to challenge characters across a broad range of levels. The updated material includes revised encounters, progression, and regional structure for use as part of the larger dungeon campaign.

Players
0
Level Based (Earn XP and level up)Dice (Primarily d20)Attribute/Stat Based (STR, CON, PER, etc)

Game facts (players, playing time, age, credits) from BoardGameGeek.