When it comes to RPG material, the quality of the various publications and writing can vary dramatically. Back in 2017 I did a Top 10 RPG Modules list of all time which was both one of the most popular articles on this blog, but also the one I doubt I will need to update anytime in the next decade.

In this list we broaden the scope a bit to talk about various RPG publications which go beyond adventure models. These are books and books series I think are not only a core part of D&D history, but very much applicable material that any good DM should own and read. This is material that will advise you, inspire you and make you a better DM.

I think it would be impossible for me to rank these so, I simply decided not to. Enjoy the list.

1st Edition Advanced Dungeons and Dragons Dungeon Masters Guide

There have been many Dungeon Masters Guide for the game of D&D, not to mention countless supplemental and advice books for running games, but to me the original works of Gary Gygax are the equivalent to what I would consider the bible for Dungeons and Dragons.

The book is written in a style that speaks directly to the DM in a commanding voice offering you advice that though can sometimes be tough to swallow in the light of modernization of the game is as true, as factual and as indisputable today as the day it was written. It’s a bit like a self help book written by your dad who doesn’t try to spare your feelings and rather focuses on preparing you for real life.

While the book is chalk full of advice, don’t be so arrogant as to assume the rules are “out dated”. The book is a literal gold mind of supplemental rules that can be universally applied to any edition of the game, quick resolutions using rules that are well suited for the abstracted concepts on which Dungeons and Dragons is founded. More than that you will find a treasure trove of magical items and an endless array of tables for quick randomized information. There are rules that cover concepts like henchmen and hirelings, magic item creation, world building concepts and a wide variations of approaches to campaign styles that are all universally applicable.

I have never run a game of D&D without this books influence regardless of edition, it is a must read and a must have for any serious DM.

The Mystara Gazetteer’s

There are many settings created for the game of D&D, but you would be hard pressed to find a setting that does a more thorough of job creating a diverse, living, breathing world in which to set your game that are directly applicable to game sessions. The Gazatteer’s were written over 16 books that detail every culture and every region of the world, but the focus of the books is to give you material you can use and it is here where most settings kind of fail for me.

The amount of inspired writing, unique story hooks and NPC characters in excessive detail makes this one of the most usable campaign settings ever written in my humble opinion.

More than that however is the fact that Mystara is a truly unique setting, not reliant on the endlessly repeating clichés found the many settings written for Dungeons and Dragons in the following years. It breaks the mold before there ever was one to base your setting off of. Since Mystara settings have been largely variations on the same concepts and it can be tough to distinguish the difference between the Forgotten Realms and point of light.

Thanks to RPG Drive Thru and print on demand, getting access to these books is relatively easy, a well worth investment for any aspiring DM looking for a place to create their adventures.

Pathfinder 2nd edition Core Rulebook

While as a DM I generally prefer simpler and more classically driven systems for my D&D like B/X or BECMI, when it comes to modern renditions of the modern game of D&D, Pathfinder 2nd edition is without question the gold standard.

It makes quick work out of complex rules while serving to provide highly involved and exciting game session. This is a game so fine tuned, so well thought out, streamlined and brilliantly diverse, that it works not just as a D&D clone but a universal fantasy system.

Pathfinder ensures that players have maximum creativity and options in their hand, while ensuring the DM can manage it all, keeping it straight for the table without having to do constant rules look ups. Pathfinder 2nd edition does everything right, including correcting the many things D&D has done wrong for 40+ years like its core action management systems.

If you are looking for a modern D&D system, before you consider 5e, consider Pathfinder 2nd edition. It is the definitive modern version of the game that is superior to everything that is out there today.

The Reavers of Harkenwold

I think the saddest part of the Dungeons and Dragons 4th edition as a game is that despite a really terrible mechanical focus, it had some of most inspired adventure and setting writing, with some of the best writers in the business providing the material. Guys like Richard Baker and Bill Slavicsek were at the helm of some of this material which included The Dark Sun Campaign book, Kyhber’s Harvest for the Eberron setting and one of my absolute favorite adventures, the two parter, Reavers of Harkenwood (The Iron Circle & The Die is Cast).

What I love about Reavers of Harkenwold is that its one of those rare instances where an setting for the adventure is so well written you can run it as written and its absolutely brilliant. That is really rare in adventure writing, I can only think of a small handful of adventures that pull that off.

Reavers of Harkenwold however is more than just an adventure, in fact that is not why its on this list, what this is really is a very well thought out mini campaign and its written in a style that really makes it system agnostic which is also something that is really rare in adventure writing. Its a setting, its an open world, it has a great villains and above all else it tests the morality of an adventuring group. By the time your troupe is done playing through this adventure, they will know who their characters are, but they will also care about a place, become involved in the setting and establish themselves as part of it. That is really what makes Reavers of Harkenwold so great as a publication.

Reavers of Harkenwold didn’t make my top 10 modules of all time list but the truth is that I have never viewed this as an adventure module, to me its a mini campaign as what makes it great is less the story and more the setting it presents.

The Rules Cyclopedia

The Dungeons and Dragons Rules Cyclopedia to me is the most definitive work ever done for Dungeons and Dragons. It combines all of the original 1st edition Dungeons and Dragons core rules under one roof before the game diverged into the “advanced rules” concept which arguably could be construed as a good or a bad thing.

To me personally the Basic and Expert Dungeons and Dragons sets combined to form THE best version of Dungeons and Dragons as a game system. To me, once the advanced rules came along with concepts like the race and class split is where most of the problems in Dungeons and Dragons started. Balance issues, rules complexity issues and all of the minutia that comes with that complexity that have driven decades of arguments what about D&D should and shouldn’t be. The B/X set never suffered under the weight of rules complexity, it was a system that was designed to be played and to this day it is the most commonly used system as a base for D&D variant. Their are more fantasy games based on B/X rules then all other D&D systems in existence times a hundred.

The rules cyclopedia is a compilation of the Basic and Expert rules, but it also includes the companion, master and immortal supplements which bring in concepts like kingdom management, high level play and topping it off with the ascension of characters as gods. Using the rules Cyclopedia is the only way a group of D&D fans can play the same D&D game for decades and never run into the balance issues of high level play. It is the most complete, all in one rule set for running D&D and its the first and last book you will ever need to run D&D forever.

Its a masterpiece in my eyes and though I prefer to run only the B/X rules myself, its great to have all the added support in the event a campaign stretches into those higher levels.

1st edition Forgotten Realms Box Set

Not to suggest that 1st is always better, but the 1st edition Forgotten Realms Box set to me is the unquestionable definitive work for this setting and everything that followed played second fiddle to it. Not only as a description and definition of the setting, but in how it was written and what it focused on.

This box set was designed to be used at the table, offering the GM key information about events in this place, events that would lead to modules linked to the original setting material. Strangely this approach was largely abandoned after this box set, transitioning to the way settings are written today where the material is “general information” about the world with an assumption that creating a story in the setting is up to the GM. I prefer the way it was done in this book as it ties key stories and events of the setting to the player characters with other fantastic material like The Pool of Radiance, The Curse of Azure Bonds and other classic stories like Expedition to Undermountain and City of the Spider Queen.

It was also before anyone started fiddling with the history of the setting to try to fit it into modern editions of the game that constantly expanded the races and classes of the game, breaking a lot of the nuances of the setting, those subtle elements that would take the setting from a believable real place to an obvious attempt to fit the latest players handbook into it.

The 1st edition Forgotten Realms setting was the only version of the setting that did not take the rules of the game into consideration, focusing on the lore and history of the world, directing its events based on the story, rather then the latest rules.

When it comes to the Forgotten Realms, this is the box set to own.

The Scarred Lands Campaign Setting

Born from the remnants of the White Wolf writers, The Scarred Lands Campaign Setting is styled after the story first concept so much of the amazing writing that was done for the world of darkness. The Scarred Lands is perhaps one of the most unique settings that exists for Dungeons and Dragons, originally published for 3rd edition D&D.

It’s a setting that defines in absolute perfect detail some of the most unique places ever inked for a Dungeon and Dragons world. Whether your talking about Calastia: The Throne of the Black Dragon that brings one of the most amazing political villains ever written into your world, The City of Hollowfaust, essentially a city run by necromancers and the undead or awesome books like The Wise and The Wicked that describe the many unique people of the world both villain and hero alike, The Scarred Lands is just chalk full of exquisite detail.

The Scarred Lands setting to me is one of the few out there written for D&D that completely breaks expectation, discards the cliques and gives the players a place to explore that will truly surprise them and again, it does this on a level so detailed that every single book written for the Scarred Lands becomes a campaign setting in of itself.

So good, it hurts.

Old School Essentials

One of the issues many modern gamers have with old school systems like 1st edition Basic D&D and Advanced D&D is that the rules are considered incoherent, hard to grasp, inconsistent and difficult to run. It has always been a problem for modern gamers to even try out old school systems to see the differences, to see what they are missing, to understand that piece of history and why their are so many fans of these old school systems. Its an unfortunate situation, one old school GM’s like me contend with all the time because frankly its all true. Old school systems are indeed written in a style that makes them really difficult to implement at the table.

In comes Old School Essentials, essentially a true down to the last detail replication of Basic/Expert rules but with modern organization to make the game as comprehensible, as easy to understand and use as the original rules desired to be. It took 4 decades for someone to unravel the mess of the original works and create a book that makes the whole thing comprehensible and not only has Old School Essentials done this successfully, but it did it better then what we see even in modern rule books.

Old School Essentials brings all the fun, excitement and glory of the old days in a easy to understand and absorb way proving that not only are the original B/X rules amazing, but it is everything modern gamers want modern D&D to be, but simply never quite gets their.

One of the best books written this decade, oddly enough using rules made 4 decades early. A masterpiece resurrected for the modern day.

Pathfinder: Kingmaker & Ultimate Campaign Guide

The 1st edition of Pathfinder was really just a spruced up version of D&D 3rd edition, but because of the timing of its release, being after 3.5 which was an extremely long running edition of the game and during the 4th edition of D&D which was one of the least popular editions of the game in the D&D franchise, 1st edition Pathfinder was the edition I actually played the most next to Basic/Expert rules.

In the course of its run, I found most of the material released for the game to be quite suitable, but it was the adventure path Kingmaker and its related source book, The Ultimate Campaign Guide that really brought the game to a whole new level.

Pathfinder takes an old D&D concept, Empire/Kingdom building found in classic D&D modules like Test of the Warlords and campaign settings like Birthright and makes it comprehensible. While the rules for domains were covered reasonably well in the BECMI system, the word comprehensible would not be how I would have described it their either for all the love I have for the system.

Kingmaker made domain running for D&D a pure joy and because the module had a great story and setup for players to take throne, it ended up being one of the most popular adventure path in Paizo’s history, so much so that they made a video game out of it.

Ultimate Campaign uses the same core system for kingdom management as Kingmaker, but expands on it and other campaign running features that allow you to create your own kingdom building stories.

Of all the stuff that came out of Pathfinder, I count Kingmaker and Ultimate Campaign Guide as the absolute best of the best and what is really great with the Ultimate Campaign Guide is that it is mostly system agnostic so you can apply the rules of kingdom management to your favorite D&D system not to mention that Kingmaker itself as an adventure path has been converted to both Pathfinder 2nd edition rules and 5th edition D&D rules making it that much easier.

Fantastic content worth getting even if you don’t use the 1st edition Pathfinder system.

1st edition Oriental Adventures

The offensively named book is to me one of the best supplements ever written for 1st edition Advanced Dungeon and Dragons and that is saying a lot as their have been quite a few that competed for a space like this.

I’m a huge fan of Japanese and Chinese lore. What Oriental Adventures does is D&D’affy it, creating not only a fantastic sub-system for Dungeons and Dragons with all new races and classes with mechanical constructs way ahead of its time like Ancestry and Honor, new spells, new equipment, but a great setting. It effectively refreshed Dungeons and Dragons using the endless well of Asian lore, doing so not only respectfully but with a fantastic fun twist.

I adore Oriental Adventures and because it’s written by Gygax, it has that commanding voice legibility to it, making it not only a fun, applicable book for the table, but a great night stand read.

There was a 3rd edition of this book and of course their are entire systems dedicated to this setting like the amazing Legend of the Five Rings, but if you already love D&D and you want an Asian twist, this is the book to get.

That concludes our list, hope you enjoyed it!