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Chthonic Codex
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Chthonic Codex


Underground Magic Academentia! 
Mysteric Religions & Initiation Rituals! 
Magic, Murder and an iridescent lake of Mana Tar!

Chthonic Codex is about the dangerous world of fantasy academia, complete with drunken students, Devouring Idols, Initiation Rituals, crotchety Savants, and ah hostile underground environment.

 Play a magic academy student, a teacher, a stranger visiting the Hypogea. Find out that, despite the dangerous and scary subterranean environment, humanity is always the real problem.

A complete campaign setting for Swords & Wizardry, Adventure Fantasy Game and other Old School games.

Dozens of new monsters and their role in the campaign setting.

New magic rules, mana-based system, completely new spell lists, spell research.

New magic schools: Fire Dervishes, Chimerists, Gatekeepers, Stargazers, Orthodox Necromancers, Artificers, Pharmacists, the Mysteric Chthonic Craft, and more.

New magic systems for all classes: join Mysteric Initiation Rituals! learn the hidden Laws of Reality!

Campaign creation and events, accomplishments, CHTHONOTRON (die-drop underworld generator), 

New magic items, including many types of scrolls.

Devouring Idols. They talk to you in your dreams, incessantly asking for their hunger to be satisfied, but at what cost?

Reviews of the previously released boxed set edition:

"This is a unique and perhaps under-appreciated thing, quite unlike any other OSR product, that deserves more attention."

Patrick Stuart - False Machine

"There's a feeling that this a world on the edge and you've just walked through the door while university is almost in full panic mode. If your expecting Harry Potter's universe, absolutely forget it! This is the world that would have burned Harry's corpse, created a display for the ashes, then put them in some back corner to be used for a demon summoning later"

Eric Fabiaschi - Swords & Stitchery

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Reviews (4)
Discussions (7)
Customer avatar
Brian B July 24, 2020 12:25 pm UTC
Is there a POD coming in the near future, or (even better) a reprint of the boxed set. I can't wait to get a physical copy of Chthonic Codex!
Customer avatar
Derek H December 10, 2018 6:37 pm UTC
If this is a hypogea, then who is buried under the Valley of Fire?
Customer avatar
Kevin W October 09, 2017 1:28 pm UTC
Any chance of getting POD version up again? Or (preferably) more box sets?
Customer avatar
Paolo G October 09, 2017 1:35 pm UTC
Yes to both. But it's taking time.
Customer avatar
Kevin W October 09, 2017 6:33 pm UTC
That is very encouraging. Thanks for your reply.
Customer avatar
Domenick P May 24, 2018 4:49 am UTC
Hello. Is there a mailing list or someplace to watch for updates on the availability of box set / PoD? Thanks
Customer avatar
Guo C March 09, 2019 6:08 pm UTC
“Chthonic Codex” in print again sometime soon?
Customer avatar
Derek H October 02, 2017 2:28 pm UTC
What rule set was this written for? I am still wondering what the monetary units are.
Customer avatar
Paolo G October 02, 2017 2:45 pm UTC
Any old D&D, with stats for Swords & Wizardry and Adventure Fantasy Game.

C is for Coin, so if you use a gold standard it's going to be gold coins, and if you use a silver standard, like in LotFP, it's silver coins.

Beside, there are no markets or merchants, and i assign almost no monetary treasures. Coins and gems are fine if you trade with remote lands, or the local farmers and fisherpeople. Given the abundance of portals, it should not be a problem to travel far!

I suggest to use barter, and owing favours. After all your Masters can just force your character to enchant trinkets for them.
Customer avatar
Derek H October 02, 2017 6:23 pm UTC
Thank you!

And if c means coin what does t stand for?
Customer avatar
Paolo G October 03, 2017 9:34 am UTC
Thaler. It's an error and should have been a c.
Thalers are the silver coins in Adventure Fantasy Game, the other game CC is statted for. It's a silver coin from Central Europe, literally "of the valley". Cognate with Vale, Dale (as in, Dalelands), and of course Dollar.
Customer avatar
Paolo G October 03, 2017 9:38 am UTC
Can you mail me where you found that T? paolo {at} lostpages co uk
Customer avatar
Derek H October 04, 2017 5:53 pm UTC
Sent, though I did include the question mark. Did you get the email?
Customer avatar
Paolo G October 09, 2017 1:34 pm UTC
I did :)
Customer avatar
Omari B December 30, 2016 6:58 pm UTC
Can you please update the PDF with some rudimentary bookmarks please?

Considering the lack of a table of contents (!!!) that is a huge oversight for usability.
Customer avatar
Paolo G December 30, 2016 10:34 pm UTC
Check the end of the book! It's there!
I need to fix the PDF for other issues and I'll fix this too..
Customer avatar
Omari B December 31, 2016 5:06 pm UTC
Cool! That helps make digging through the content a little more palatable.
Customer avatar
Derek H December 23, 2016 1:41 pm UTC
Why was the POD withdrawn?
Customer avatar
Paolo G December 23, 2016 1:45 pm UTC
I put some corrections through, but then the file had issues. I'm trying to fix it!

On the other hand, preorders are open for the new printing of the boxed set.
Customer avatar
Derek H December 23, 2016 2:47 pm UTC
Okay, good to know. It is such a great little book, just brimming with nifty ideas.
Customer avatar
Jorge A December 27, 2018 3:29 am UTC
Been waiting for the boxes set or PoD for a while. Any updates?
Customer avatar
Derek H March 21, 2016 1:32 pm UTC
For some reason the link in my review will not display correctly, so let's see if this works:
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File Last Updated:
November 02, 2016
This title was added to our catalog on December 09, 2015.
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