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The World's Largest Dungeon

Created 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 World's Most Popular Roleplaying Game!

Latest Updates from Our Project:

World's Largest Dungeon announces Secret Doors Volume I
about 1 year ago – Wed, Apr 09, 2025 at 10:32:49 AM

Amateur Designers Compete for Cash, Publication, and a Place in the World's Largest Dungeon!

Portals to Adventure, in partnership with World’s Largest RPGs and Strange Owl Games, is thrilled to announce the launch of its inaugural Secret Doors Contest, a global competition inviting amateur writers and aspiring game designers to submit original RPG dungeon content for a shot at cash prizes, professional recognition, and publication in the upcoming World’s Largest Dungeon: Platinum Edition.



The contest officially opens April 13, 2025, and is free to enter.

What’s behind your secret door? 

Contestants are challenged to design a creative, 5E-compatible dungeon space that lies hidden behind a secret door: anything from a trapped vault to a forgotten lair, a cursed library, or a portal to a twisted demiplane. Submissions will be voted on by fans, with the top entries winning cash and publication.

“We’re looking for new voices in adventure design,” says PTA team leader Timothy Brown. “If you’ve ever dreamed of becoming a professional RPG writer, this is your chance.”

Prizes and Publication Opportunities

  • 1st Place: 50% of Prize Money Total, Publication, Trophy, Secret -Doors Book
  • 2nd Place: 10% of Prize Money Total, Publication, Trophy, Secret Doors Book
  • 3rd–10th Place: 5% of Prize Money Total each, Publication, Trophy, Secret Doors Book
  • All 20 Finalists: Featured on the site and awarded commemorative ribbons

All winning entries will be published in Secret Doors, Volume 1, an anthology of amateur and professional dungeon entries included with the World’s Largest Dungeon: Platinum Edition, set to release in 2025.
Winning authors will be published alongside TTRPG industry legends, set to be included in the Secret Doors Volume 1, including:
  • Timothy Brown (Dragon Kings)
  • Robert J. Schwalb (Shadow of the Demon Lord)
  • Leamon Crafton (Torg Eternity)
  • Rachel Savicki (Space 1889 After)
  • Patrick Kapera (Krafty Games)
  • Kaitlyn Walden (Thieves’ World)
  • Ian Starcher (Cthulhu Mythos)
  • and many more!

Submission Requirements

To participate, entrants must submit:
  • A written Secret Door adventure (up to 4,500 words)
  • A dungeon map (hand-drawn or digital)
  • A short video introducing themselves and their concept
  • A thumbnail image for fans to see when browsing submissions

Open the Door to Your Future

The Secret Doors Contest is open to international entrants aged 18 and older who have never held a full-time job creating role-playing games. Freelancers and hobbyists are welcome to compete. All submissions must be original and adhere to SRD 5E rules. AI-generated content is strictly prohibited.

Ready to take the leap? Sign up for contest alerts or learn more at www.portals-to-adventure.com

Launch Date Announced!
over 1 year ago – Wed, Mar 12, 2025 at 07:30:43 AM

The World's Largest Dungeon returns May 13th!


📜 The History

Initially published in 2004 by Alderac Entertainment Group (AEG), The World’s Largest Dungeon is a groundbreaking RPG adventure that set a Guinness World Record for its unprecedented size and scope. Featuring every monster from the System Reference Document (SRD), this mega-dungeon campaign takes players from level 1 to 20 in a massive, interconnected underground world. Designed to be an all-in-one, inescapable dungeon experience, it quickly became a legendary challenge among tabletop RPG enthusiasts.

⚔️ World’s Largest RPGs

Now, 20 years later, the Platinum Edition brings this iconic dungeon back to life, fully updated for 5E, with new content, exclusive miniatures, stunning maps, and expanded adventures for a new generation of adventurers.

The Platinum Edition of the World’s Largest Dungeon will launch its crowdfunding campaign on BackerKit on May 13th, 2025. This updated edition will incorporate the latest rules, enhanced editing, and stunning new artwork and maps, all meticulously overseen by our publishing partner, Strange Owl Games.

🏰 The 20th Anniversary Platinum Edition

This edition boasts incredible new features, including:
  • 16 NEW boss miniatures
  • Curated Miniature Sets from Reaper Miniatures
  • 16 poster-sized maps + NEW detail maps
  • Over 1,600 original encounters fine-tuned for modern gameplay
  • Exclusive Fanroll diceAudiobook by AudioRPG
  • NEW stretch goal content
  • Secret Door Encounters featuring guest designers from iconic worlds like Dragon Kings, Fading Suns, Torg Eternity, Thieves' World, and more.The Platinum Edition is a unique opportunity to relive seminal design work from industry legends who have gone on to shape the Fantasy genre landscape such as Robert J. Schwalb (Shadow of the Demon Lord, Warhammer Fantasy) and Richard Farrese (Assassin’s Creed, World of Warcraft). Original lead designer jim pinto returns to the project, entirely redesigning the infamous first level and providing an all new adventure to bring players into the World’s Largest Dungeon.

📚 The Books

The World’s Largest Dungeon is returning in a four-book set, updated for modern play while keeping the original dungeon’s depth and challenge intact: it is easier than ever to navigate the dungeon’s encounters, factions, and secrets.

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🐉 The Minis

Alongside the books, we’re producing 16 boss miniatures to bring some of the dungeon’s most dangerous enemies to life. Here are three from the lineup:

🙊 Secret Door Adventures

A Secret Door Adventure is a self-contained dungeon expansion crafted by a variety of talented RPG authors to add new encounters, lore, and unique challenges to the World’s Largest Dungeon. These adventures introduce unexpected twists, hidden threats, and entirely new ways to experience the dungeon. Industry greats like Timothy Brown (Dragon Kings, Dark Sun), Robert J. Schwalb (Shadow of the Demon Lord, Warhammer Fantasy), and Leamon Crafton (Torg Eternity) are already providing Secret Door Adventures for the campaign.

🏆 An Epic Contest for Aspiring Designers

The campaign introduces a groundbreaking Secret Door Adventures Contest in partnership with Portals to Adventure. Aspiring RPG designers can submit their own dungeon encounters, with fan-voted winners included in the Secret Doors book joining the new contributions from a host of elite creators.

Other World's Largest RPGs Projects

AudioRPGs 

Many of you have expressed that you'd like to stop receiving updates on the World's Largest RPG's AudioBook projects. We heard you and have created a second backerkit account. If you DO want AudioRPG Updates, you should follow us here at https://www.backerkit.com/c/users/2912993/profile