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World’s Largest RPGs is preparing to unleash the 20th anniversary edition of the World’s Largest Dungeon.
Launched in 2004 by by Alderac Entertainment Group, the original edition of The World's Largest Dungeon was a Dungeons & Dragons campaign set, beginning to end, in one ginormous dungeon. With a page count in excess of 800 pages long, it remains one of the largest, most gloriously ambitious campaigns ever published in one tome.
Now retooled for 5e, this shiny new Platinum Edition refurbishes, revitalises and relaunches this iconic dungeon. As well as the flagship dungeon, World’s Largest Dungeon is said to include ‘new content, exclusive miniatures, stunning maps, and expanded adventures for a new generation of adventurers’.
This updated edition will also boast ‘the latest rules, enhanced editing, and stunning new artwork and maps,’ all of which have been curated by World’s Largest RPGs’ publishing partner, Strange Owl Games. Not enough? Then how about:
16 new boss miniatures
Curated miniature sets from Reaper Miniatures
16 poster-sized maps
Over 1,600 original encounters
Exclusive Fanroll dice
An audiobook by AudioRPG
New stretchgoal content
Secret Door Encounters featuring guest designers from iconic worlds like Dragon Kings, Fading Suns, Torg Eternity, Thieves' World, and more.
The World's Largest Dungeon launches 13th May, 2025. Visit the prelaunch page now to receive a free and exclusive badge*.


*That’s a ‘pin’ to our American friends.
Images courtesy of The World's Largest RPGs

A dramatic illustration features a fierce dragon with large, menacing horns and an open mouth, set against a backdrop of a dark, rocky dungeon. In the foreground, two books titled "World's Largest Dungeon" are displayed, alongside an open book revealing intricate artwork. The text at the top announces the upcoming release date of May 13, 2025, and emphasizes the campaign's return through BackerKit.

The image features the 20th anniversary edition of "The World's Largest Dungeon," showcasing several books with vibrant, illustrated covers prominently displayed. An open book in the foreground reveals detailed text and a colorful illustration of a character, highlighting game mechanics and lore. The overall design emphasizes a fantasy theme, with rich colors and intricate artwork that reflect the adventurous spirit of tabletop RPGs.

A vibrant promotional image for the 20th anniversary edition of the World’s Largest Dungeon features a dramatic dragon emerging from a rocky background, its fierce expression and detailed scales highlighted in shades of orange and gold. In the foreground, two book covers of the World’s Largest Dungeon are displayed, showcasing intricate artwork that hints at the adventures within. The text announces the launch date of May 13, 2025, and emphasizes the excitement with the phrase "IT'S COMING!" along with the Backerkit logo.