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CASTLE OLDSKULL - The Classic Dungeon Design Guide III


Welcome to the GM's Day sale! From now through March 10th, this title has been marked down by up to 40%! For more values, visit our GM's Day sale page.

Enchanted fountains shadowed by gargoyle sentries,

Tricksy nymphs cavorting in crystal pools,

Unholy altars, sacred shrines,

Undiscovered treasure vaults,

Thousands upon thousands of wondrous rooms

Filled with treasure, tricks, magic and eldritch horror,

All awaiting your heroes’ intrepid discovery …

What greater mysteries await far below,

For only the most dauntless magi

And fearless warlords to ever find?

Continuing the proud tradition of The Classic Dungeon Design Guide (Books I and II), Book III provides you with a nearly endless array of dungeon room types which you can use to build any size, plan and theme of dungeon you desire. This is the largest and most extensive dictionary of dungeon rooms in existence, featuring over 1,300 unique entries and 6 matrixed D1000 generation tables for the appropriate thematic structuring of underworld strongholds, ruins, temples, tombs, cave labyrinths, and more.

The exhaustively complete matrix tables allow you to build thematic dungeons with ease, just using room size consideration, floor planning, and random die rolls. When coupled with the dungeon content generation systems featured in Book II, you will now have everything you need to create an infinite number of instant dungeon rooms with instant contents and unique features.

In this massive tome you will also find many detailed real-world examples of layouts and room arrangements for caves, dungeons, manor houses, castles, and catacombs; and underworld lore that explains how to turn random results into coherently structured underworlds (such as deep dwarven undercities, arenas, hideouts, haunted fanes, and more).

So what are you waiting for? This book is the perfect companion to The Classic Dungeon Design Guides I and II, and has been specially designed to serve both as a learning grimoire and as a tabletop go-to book for design and for sandbox play. After all, if you’re going to dare to delve into the netherworld, you should probably take not just a lantern and an elvish sword of great antiquity; you should also carry the ultimate guidebook with you along the way …

Another classic and epic Fantasy Role-Playing Game Supplement from Wonderland Imprints, Only the Finest Works of Fantasy. (85,500 words, 272 pages. With 150 illustrations in full color.)



To view the entire library of available titles for Castle Oldskull, Hawk & Moor, Old School Essentials compatible supplements, and more, please visit Kent David Kelly's Wonderland Imprints publisher page.

Disclaimer: This product contains assets that were procedurally generated with the aid of creative software powered by machine learning.


Full Color Softcover and Hardcover Print Edition

This book is also now available in a full-color 8.5”x11” print edition, in both paperback and hardcover formats, at the author's Amazon page.


The Wonderland Imprints Swords & Sorcery Library


Supplement Title

Primary Game Topics


The Classic Dungeon Design Guide I

Dungeons / Lore / Random Tables


The Classic Dungeon Design Guide II

Dungeons / Lore / Random Tables


The Classic Dungeon Design Guide III

Dungeons / Lore / Random Tables


Oldskull Dungeon Generator

Dungeons / Solo Gaming Tools


The Book of Dungeon Traps

Dungeons / Random Tables


Oldskull Dungeon Tools

Generators / Solo Gaming Tools


Game World Generator – Deluxe Edition

Game World / Random Tables


Oldskull Adventure Generator

Game World / Random Tables


Chaotic Descriptor Table

Generators / Random Tables


Dungeon Delver Enhancer

Characters / Lore / Random Tables


Oldskull Warriors

Characters / Classes / Lore


Oldskull Knights

Characters / Classes / Lore


Oldskull Anti-Paladins

Characters / Classes / Lore


Oldskull Plague Doctors

Characters / Classes / Lore


Oldskull Gonneslingers

Characters / Classes / Lore



Characters / Races


Oldskull Half-Ogres

Characters / Races


Oldskull D100 NPC Generator

Characters / Generators


Character Tables

Gameplay / Tabletop Reference


Combat Tables

Gameplay / Tabletop Reference


Dungeon Monsters & Treasures Level 1

Monsters / Treasure


Oldskull Dungeon Encounters

Lore / Monsters / Treasure


Oldskull Dungeon Bestiary

Monsters / Random Tables


Oldskull Dragons

Monsters / Treasure


Oldskull Trolls

Lore / Monsters / Races


Oldskull Monster Generator

Generators / Lore / Monsters


Oldskull Treasure Trove

Random Tables / Treasure


The Oldskull Deck of Strangest Things

Lore / Random Tables / Treasure


City State Encounters

Random Tables / Urban Adventures


The Order of the Scarlet Tabard

Characters / Lore / Random Tables


Captains of the Scarlet Tabard

Characters / Lore


Oldskull Tyrrhenia Map Pack

Game World / Lore / Realm Maps


333 Realms of Entropy

Game World / Lore / Monsters


1,000 Rooms of Chaos

Dungeons / Solo Gaming Tools


1,000 Rooms of Chaos II

Dungeons / Solo Gaming Tools


The Pegana Mythos

Characters / Game World / Lore


The Oldskull Necronomicon

Characters / Game World / Lore


Lords of Oldskull: Krampus

Classes / Lore / Monsters


Character Creation

Basic / Expert (B/X) Characters


1977 Bestiary

Basic / Expert (B/X) Monsters


Adventurer’s Arsenal

Basic / Expert (B/X) Equipment


Turn Tracker

Basic / Expert (B/X) Gameplay


Oldskull Grid War

Basic / Expert (B/X) Gameplay


Hawk & Moor Book I

TSR / Gary Gygax History 1973


Hawk & Moor Book II

TSR / Gary Gygax History 1974


Hawk & Moor Book III

TSR / Gary Gygax History 1975


Hawk & Moor Book IV

TSR / Gary Gygax History 1976


Hawk & Moor Book V

TSR / Gary Gygax History 1977


The Steam Tunnel Incident

TSR History / 1980s


(And more can be found at the Wonderland Imprints publisher page.)

Don't know where to begin?

Each of the Wonderland Imprints series has an acclaimed first introductory volume. You can start there, and then journey further as you choose.

Series include the Black Label Editions (unillustrated tabletop volumes), Castle Oldskull (old school RPG supplements), The Classic Dungeon Design Guides (system neutral dungeon crafting), Hawk & Moor (Dungeons & Dragons history), Old School Essentials (supplements for Gavin Norman's B/X game), Oldskull Innovations (unique experimental products), and the Oldskull Library (classic weird fiction), as well as many Free Supplement Releases.

 Customers Who Bought this Title also Purchased
Reviews (1)
Discussions (3)
Customer avatar
Juho P November 28, 2022 6:38 pm UTC
Where did the random room content table go? I used to love rolling on that to fill everything, but I can't find it in this new version.
Customer avatar
Kent K December 01, 2022 9:17 am UTC
(Spoiler) that section is being turned into an entire 400-page book.
Customer avatar
Lesley N July 21, 2022 9:16 pm UTC
Simply incredible. I'm inherently cheap, and I don't like buying pdf files.
But this is me saying, hardcover please.

Go for it Kent. Your books are good. I grabbed all 3 of the Dungeon Design Guides today.
Your books look very solo friendly in that I can imagine myself creating with your products, and using them to enjoy solo gaming through them.
Going to copy paste this two the other 2 tomes, as I feel the same about all 3.
Customer avatar
jim P April 13, 2020 6:20 am UTC
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File Last Updated:
November 01, 2022
This title was added to our catalog on April 28, 2017.