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Castle of the Mad Archmage Adventure Book
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Castle of the Mad Archmage Adventure Book

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The legendary megadungeon is here at last! 

More than thirteen levels and over 1,500 keyed encounters of perils, monsters, traps, and treasure to bedevil your players. Find levels of warring humanoids, the deadly Arena, ancient artifacts, lost temples, portals to other worlds, and the ultimate secret of the dungeons... the Mad Archmage himself.

Originally released as a free electronic book in serial format, the Castle of the Mad Archmage has been completely revised, expanded, and updated. It is a complete adventuring environment, from the surface ruins to the deepest caves and caverns. 

You and your players could literally spend years exploring the dungeons beneath the Castle and still not discover everything. It can accomodate characters from first to fifteenth experience level and beyond.

Castle of the Mad Archmage is written using the Adventures Dark and Deep™ rules, and is compatible with most Old School type rules with little or no conversion needed.

Note: You must also purchase the Map Book and the Illustration Book in order to run this adventure (due to a technical limitation of the site, you need to add each to your cart separately).

Also available in a Pathfinder Roleplaying Game edition!

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Reviews (1)
Discussions (7)
Customer avatar
Robert C July 31, 2017 5:52 am UTC
Can someone tell me how many pages the PDF is? asking for a friend...
Customer avatar
Joseph B July 31, 2017 10:58 pm UTC
The file is 158 pages total.
Customer avatar
Ralph T September 18, 2016 8:58 am UTC
I see there is a bundle for this now, but it also includes physical copies. Would it be possible to get a bundle with just the PDFs?

I also see an addition for Pathfinder so I was wondering if there are plans to release a version for 5e?
Customer avatar
Antonino A November 28, 2015 3:13 am UTC
So, this is really a 20$ pdf mega-dungeon (since you need the other two books). How is it not possible to make a pdf with the maps and the illustrations attached at the end...?
It could be worth, but I don't like the motivations ("technical limitations") for it to be all 3 NECESSARY books together.
Customer avatar
Joseph B November 28, 2015 2:26 pm UTC
Originally the maps were in the book itself, as an appendix. However, in playtesting, it was found almost universally that forcing the GM to flip back and forth in the same book between the text and the maps was very inconvenient, to the point of uselessness. Ditto with the illustrations, which are intended to be shown to the players as they reach certain places in the dungeon. You would have to flip to the back, show the players the illustration (possibly having to cover up other illustrations on the same or the facing page), and keep your place (both in the text and the maps) all at the same time. It just didn't work.

As for the technical limitations - when OBS allows me to put a bundle up as a "Deal of the Day", then no one will be happier than I. Unfortunately, that's not an option at this time.
Customer avatar
Chet C November 28, 2015 5:51 pm UTC
Now THAT makes sense, and I do remember it (flipping around in the books to find the proper map) being an annoyance back in '79. Though major publishers (anything not mimeographed?) had separate maps, many others had maps only in the books. Some great Runequest adventures (Dang broos!) were frustrating in that regard. How exciting it was that CSotIO came with separate maps - even if they DID take up the entire living room floor!
Customer avatar
Chet C March 30, 2014 3:34 pm UTC
OK, the Reviews tab sez there yam two (2) reviews contained within said tab. But they ain't there. Where DID those reviews go? Don't nobody leave this room!!!
Customer avatar
Joseph B March 30, 2014 4:12 pm UTC
That's a good question! I know they were there before. I'll get in touch with tech support and hopefully they can figure out what's going on.
Customer avatar
Joseph B April 02, 2014 7:14 pm UTC
Heard back from the support folks. It turns out that when you see a number on that "Reviews" tab, it's including every time people gave a star rating, even if they didn't do a text review as well. They say breaking that out is on the list of things to do, but not anytime soon.
Customer avatar
Chet C April 02, 2014 7:36 pm UTC
Strange. I remember seeing genuine reviews there also.

It looks as if I'll have to write something once I read it. Which I'll do more frequently when the hard copy arrives. It's too easy to neglect it when it's on a hard drive somewhere.
Customer avatar
Joseph B March 09, 2014 3:43 pm UTC
Kevin K - can you please email me at I'd like to know which of the three pdfs is giving you problems, as you're the only person to report this sort of issue thusfar. Might be a corrupted file?
Customer avatar
Kevin K March 09, 2014 2:24 pm UTC
This is probably the best large D&D dungeon I've every owned. I downloaded the free version years ago. This is the same dungeon with a very professional polish added.

But, and this is a big but, the PDF will not run on my surface. I can run bigger Pathfinder or GURPS PDF's without a problem. I've had up to SIX of their books open at the same without my tablet slowing down. So why do the Castle of the Mad Archmage PDFs take three minutes to open just the first page? I don't know. They are also slow but usable on my desktop. Since I can run things by many other publishers fine it's got to be a formatting problem by BRW.
Customer avatar
Kevin K March 10, 2014 12:12 am UTC
OK, the problem isn't in the PDF or in my surface, it's in Adobe. Removed the latest version of Adobe Reader Touch and went back to an older version that wasn't touch enabled and the PDF works fine. Going to see if I can convince my group to give this a go starting next weekend.
Customer avatar
Thomas P March 05, 2014 1:46 pm UTC
so...lets see some reviews people..supposedly this is a hot seller...what do you think of this adventure book??
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File Last Updated:
January 05, 2021
This title was added to our catalog on January 30, 2014.