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Dyson's Delves


Customize your dungeons!

Adventures and maps set under the earth for old-school fantasy roleplaying games (OSR games).

Dyson's Delves contains over 140 pages of maps and adventures featuring the unique mapping style of Dyson Logos.

Five full adventures fill out the beginning of the book, followed by 44 additional dungeon maps each with a page for the GM to key and make notes about each dungeon.

The adventures in this volume are:

  • Dyson's Delve - an 11 level crawl that takes characters from level 1 to level 6
  • The Charmed Grotto - a subterranean adventure for characters levels 5 to 8
  • Ruins of the Gorgon - a smaller adventure for level 4 characters
  • The Worm's Gullet - award-winning adventure for levels 4-6
  • Erdea Manor - massive four-level crawl for levels 3-6


Each map in the second portion of the book is presented on it’s own page opposite a lined page that you use to indicate where the dungeon in question is, what it is known as on your campaign map, as well as what is important about it in your games. 


This book is designed at 6x9 layout, not letter - which means it uses single-column text which entails easier reading on electronic devices.

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Reviews (5)
Discussions (3)
Customer avatar
Andrew S November 18, 2021 10:03 pm UTC
A very useful toll for busy games masters
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Bob S September 09, 2020 1:52 pm UTC
The images on this are not working.
Customer avatar
Rachael S June 01, 2016 4:57 pm UTC
Do you have a layered version where I can turn on/off $ and over/under passes. Basicly I would LOVE to have a player's version to hand out where I don't show players stuff their characters would not see.?
Customer avatar
Dyson L June 02, 2016 12:32 am UTC
No, as everything in these volumes was drawn by hand, there are no layered versions with different elements.
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Product Information
Platinum seller
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File Size:
14.94 MB
Original electronic Click for more information
Scanned image
These products were created by scanning an original printed edition. Most older books are in scanned image format because original digital layout files never existed or were no longer available from the publisher.

For PDF download editions, each page has been run through Optical Character Recognition (OCR) software to attempt to decipher the printed text. The result of this OCR process is placed invisibly behind the picture of each scanned page, to allow for text searching. However, any text in a given book set on a graphical background or in handwritten fonts would most likely not be picked up by the OCR software, and is therefore not searchable. Also, a few larger books may be resampled to fit into the system, and may not have this searchable text background.

For printed books, we have performed high-resolution scans of an original hardcopy of the book. We essentially digitally re-master the book. Unfortunately, the resulting quality of these books is not as high. It's the problem of making a copy of a copy. The text is fine for reading, but illustration work starts to run dark, pixellating and/or losing shades of grey. Moiré patterns may develop in photos. We mark clearly which print titles come from scanned image books so that you can make an informed purchase decision about the quality of what you will receive.
Original electronic format
These ebooks were created from the original electronic layout files, and therefore are fully text searchable. Also, their file size tends to be smaller than scanned image books. Most newer books are in the original electronic format. Both download and print editions of such books should be high quality.
File Last Updated:
November 02, 2013
This title was added to our catalog on May 31, 2013.