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Congrats on the amazing work, we have a big retro-gaming community here in Brazil which is really interested in OD&D and Chainmail. Would it be ok to translate your text to portuguese? Non commercial use, of course.

hello, thank you so much for your kind words and offer! that would be wonderful and you are absolutely free to do that :) though i regret not having the text available in an easier format to work with. after the beta version, i will probably work on creating an html/epub version of the manuscript. would you like me to let you know when either version is available, if it would make translation easier?

i’d also be happy to lay out the portuguese text in pdf form! :D

Thanks! It would be great if you let me know when a possible text/html version is available. It really would speed up translation. Anyway, congrats on the good work and thanks again

In the versioning and licensing section it says

it finds precedents in projects like Greyhawk’s Single Volume Edition.

but you probably meant Greyharp instead of Greyhawk, unless there is another single volume edition I am unaware of named that.

oops, thank you! have had both things on my mind lately :)

Hey, if you want more art for this, I’m happy to contribute.

thank you so much! :) you are welcome to contribute any pieces you like! please email me at, along with how you’d like to be credited and how you’d like your art to be licensed!

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Love your work on rehashing Gygaxian style! Very few OD&D retroclones treat game as wargame campaign ruleset, and none that I know include Chainmail rules. It's my retroclone of choice from now on :)

Though, I have an issue with updated missile fire table (p 176).

Original table uses terms `Unarmored`, `1/2 Armor or Shield`, `Fully Armored`. These terms do not correlate with armor types. Instead, they represent amount of armor worn. Thus, unit wearing leather armor, helmet and shield might be considered to be fully armored, but unit wearing plate mail without a helmet is only half armored.

This is one of many rules open for interpretation. It might be important to leave the interpretation of this one at the reader's discretion.

Also, a few rules are missing from appendix A, specifically: formation changes, fatigue, cover from missile fire. (tho nobody will miss fatigue)


thank you so much for your kind words and feedback!

i have no clue where i got unarmored/leather/chain/plate from in the missile fire table–where does chain in particular come from?! will fix in the next version XD i agree that the original scheme is much more interesting and flexible!

there are indeed many things missing from appendix A, since it was conceived of as an abridgement rather than a straight clone. formations in particular i removed from the ruleset since, functionally, i thought they were better abstracted by having however many figures in an (implicit) 3” diameter area. still, i’d be happy to add those rules to be a more faithful representation of the original!


due to popular demand (!), will be incorporating those missing rules! :D


Just wanted to say that this is fantastically layed out, and I love the color coding of the diffrent booklets

thank you so much! :)

This seems very neat, but anybody actually played this instead of just reading it?

Also reading through this now, and please take the effort to add bookmarks for referencing a pdf are a godsend,

will be adding pdfs when i get a new computer! i have only been able to make small changes in a single day since my current one is broken.

my own interest in the original text is more literary than for play, but it’s a ruleset that has existed for almost 50 years and is famously confusing and vague! this one is at least better organized ;)

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I've been playing several games with the original booklets in the last 2 years, I find it really amusing and creative gameplay. Now I'll certainly play more with this version.


Question to readers/players: In OD&D, I'd never noticed the prime requisite use of other abilities than each class's main one (p10 of FMC). And I can't make heads nor tails of it.
Could anyone give me an example?

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hi eric! that rule would transform into the point reallocation rule in the different versions of basic d&d, but in the original ruleset it is implied that there is no actual reallocation :)

for example, suppose that a fighter has 12 strength, 11 intelligence, and 12 wisdom. they have 11 - 9 = 2 points of intelligence which can count as 1 point of strength, and 12 - 9 = 3 points of wisdom which can also count as 1 point of strength. therefore their overall total “strength” for the purposes of XP is 12 + 1 + 1 = 14!

another example is that if your character has 10 strength, 15 intelligence, and 15 wisdom, the math works out so that they can also be a fighter with a virtual PR score of 10 + 3 + 2 = 15!

meanwhile, all the scores themselves seem to stay the same.


Thank you for this! Fun to read, well done. 

Is the general understanding that if one's CON is super low, there's no percentage chance for survival? Or does one adopt the values as above (6 would be 30%, 5 would be 20%, etc) and also have the hit point penalty?

hi, thank you so much! :) it is up to your interpretation, but it seems to me like below-average CON characters have a 0% chance of “survival” while above-average CON characters have a 100% chance! i like yours better though, haha.


"Four to FIFTY players"

Oh, gods, please take care of that poor referee's soul!
(Literally laughing out loud.)


One thing to consider is that number doesn't indicate the precise number of players at the table at any one time. It just means that number of players participate in the campaign. For example, when I ran a West Marches game years ago we had 25 players at any one point participating, but usually only 6-7 showed up for an actual game session. Then, the next game had 6-7 players too, but it might be a few different players swapped out or something. 

There were multiple parties with small numbers of players, but they all played in the same 'game world'. A GM didn't run all 50 at once, but, more or less, serially in smaller 'combat units' (parties).


I'm glad to see that robots and androids are still "self-explanatory" in a way lol. Is the hiding Balor stat block intentional? I was pleasantly surprised to see them on some of the tables!


YAYYY i’m so glad that bit isn’t going unnoticed! also now that you bring it up, maybe it would be nice to have stats for the “balor”/balrog (which i just found, woo!)–but it’s also kinda funny to have them in the encounter tables but not actually described. will have to think about it! maybe i can write a description but cross it out to be silly.


So excited to read through this over the weekend

thank you!!!


Gosh I am SO STOKED this has dropped. I’ve been excited for this for SUCH A LONG TIME omg


thank you so much!!!


This is super cool - am I right that this is probably one of the most faithful 74 + miniatures rules retroclones out there?

Love love love the art - perfectly hits that 74 style.

Also, why CC rather than OGL?


thank you, on all accounts! :) CC is just a more open license than OGL, especially since my intent is to treat this as a text rather than as a brand of role-playing games (which OGL is written to handle, specifically)


This is phenomenal! Description of robots, golems, and androids is particularly appreciated.




this is wonderful. Thank you. Wish you also had a way we could “purchase” from you — even a nominal “tip.” I’d rather not download 200+ pages right now, but would love a way to save this masterpiece in my itch library. 


hi, thank you so much! :) that’s a good point and one i’m not sure of how to handle, but i’ll ask around for a solution!

just make the release a PWYW - people can still pay 0 and download it, but people can also send you money

the project is meant to be strictly free to access, especially because multiple people contributed to it on that basis.

Ah, gotcha. Got hung up on the first part of the question, since I saw you'd answered the part about the collection. My b!


i realized that something you can try is adding it to a collection! i’m sorry it’s more out of the way than it being directly in your library, but it’s one way to more easily keep track of it and other free games 😊


thanks! Will try that!!