The oldest and most influential sci-fi TTRPG of all time meets the world’s most popular roleplaying game, with a complete 5e conversion by World’s Largest RPGs.

The World's Largest Dungeon is a 1,600+ page, four-book behemoth megadungeon. Experience the Guinness World Record-winning dungeon crawl like never before - fully updated to 5E of the Worlds Most Popular Roleplaying Game!

Eliminate the slog in your 5e combat, speed up play and maximize interesting, tactical choices for players and DMs.