Advanced Search

Mythos Insanity System 5e (preview)Click to magnify

Mythos Insanity System 5e (preview)

Suggested Price $3.00

This is an insanity system for cthulhu mythos gaming in 5e meant to be applied to spells, monsters, monster attacks, mythos tomes, and many other things in coming products. Consider this to be the most tentative of previews, and please consider supporting the project, or simply buying some of my other content on offer. 

I would like to thank my audience for their support, recently I have checked and seen I have gotten over 1200 downloads, and I am happy to see that number continue to grow.

Please check out Mythos Magic Proficiencies, a second product directly related with this one for additional content.

Note. Cover art is AI generated.

 Customers Who Bought this Title also Purchased
Reviews (0)
Discussions (1)
Customer avatar
Scott R October 05, 2022 12:38 am UTC
Understand it’s tentative, but a few questions… what determines the DC, as in what specifically in the stat block?
Also, will any advice be given to role play of the different conditions or levels?
I see where you are headed, and some polish might be all it needs.
Customer avatar
Osiris T October 11, 2022 10:13 am UTC
Sorry I did not get to answering your question earlier.

I figured that in general the DM would set the DC, but I will have a sample list coming out with just a list of mythos monster names, with the dc and madness gain. There will be also be monster attacks and spells which set the dc and madness gain as well.
I was not sure as to what I should write as for advice on how the conditions should be role played, though I think I will consider this in the future.

Additionally this will also tie into spells and mythos tomes which I will create at a later time.

I am sorry it is taking so long. I am only one person and I am truly trying to work as fast as I can. I have every intention of polishing things up later.

Thank you for your comment. Do you have any additional thoughts?
Customer avatar
Scott R October 26, 2022 1:55 am UTC
I think I'll wait for your next iteration, then comment.
Customer avatar
Osiris T November 20, 2022 8:20 am UTC
Well I have managed to make a new version which has general guidelines on how to roleplay each stage of madness. I have not made guidelines for each condition though because I have been sick. The new version can be found on my publisher page.

I am sorry that things have not been ideal, I have been sick lately and I have not been able to work on much. But I plan on making another version after this as well which will go into it. Thank you for your understanding.
Browse Categories
 Follow Your Favorites!
NotificationsSign in to get custom notifications of new products!

Product Information
Rule System(s)
File Size:
13.28 MB
Original electronic
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:
October 16, 2022
This title was added to our catalog on October 04, 2022.
Publisher Average Rating