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Sig: Manual of the Primes

Sig: Manual of the Primes



Sig is the nexus of the multiverse: a city connected to everywhere, a refuge for the oppressed, and a prize for tyrants. It’s a launching point, allowing fools and heroes to venture into the eternal planes of existence.

Play as one of the Giants of the Plane of Stone or the Wyrms of the Plane of Destruction. Challenge yourself in scorched wastelands of the Crucible in the Plane of Flame. Seek answers to hidden secrets in the Umbral Delta of the Plane of Shadow. Defend yourself in the Final Court, where the Seven Magistrates provide final remedy to any injustice.

Want to try Sig out? Download a free Quickstart for Sig, which includes everything you need to run a one-shot session.


Chapter 1 presents the rules of play. It offers tools for collaborative scene framing, free-wheeling roleplaying, tense conflicts, and revealing interludes.

Chapter 2 is about creating compelling characters. Build your own freebooter, be they descended from planar heritages or immigrants from the prime worlds. Weave a web of connections and characters who bind the group together.

Chapter 3 describes the Eternal Planes of Existence, their inhabitants, and their supporters. Each plane has their own landmarks, native inhabitants, friendly Factions, and resident divine Powers.

Chapter 4 is the Atlas of Sig, describing the various neighborhoods of the city and the important people who represent them. Discover the Hive, where the destitute and the desperate struggle to survive; or the glory of Highspire, home of the mighty.

Chapter 5 speaks of the infinity of prime worlds, those familiar mortal realms. These include rules for collaborative world-building and a list of exciting worlds to explore, as well as 8 new prime worlds prepared by a roster of professional designers.

Chapter 6 provides other resources to run the game, including detailed examples of character creation and an example of play. This chapter also offers the Night Market adventure, exploring what happens when the Shard Realm of Empire binds to the City Between.


Sig focuses on collaborative narration and difficult decisions. When two participants propose different outcomes to a situation, each participant rolls dice, adding in bonuses if they have applicable Talents. The participant in the conflict with the highest score gets the desired outcome and must pay the Price of Victory.

Players gain Influence by confronting their Beliefs, and they use that Influence to shape the world around them and encourage each other to grow. As the player characters change, so too does Sig; the city’s tethers to different planes of existence shift and reorganize, changing the fundamental nature of the city itself.


Read Katherine Cross’s review of Sig on Gamasutra!

Listen to an actual play podcast of Sig !

Listen to this podcast interview on the Modifier Podcast about aligning setting to mechanics, or this one on the Misdirected Mark Podcast where I describe the game.

Check out the free Sig quickstart,

Print copies of the full-colour, glossy hardcover book are available at Indie Press Revolution.

A crowd of diverse fantasy characters

Welcome to Sig!

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Reviews (4)
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February 17th, 2017
I really like the system and the story but I had a hard time getting the prime manual to open and I still do. [...]
January 25th, 2017
I am a backer for the kickstarter of Sig: Manual of the Primes. This review is based on reading through the PDF but not having played it at the table yet. Sig appraches world and character building with dedicated rules that lean on games like Burning [...]
February 11th, 2016
This is a cool setting well suited to the concept of the game. It's also very flexible, leaving us an infinity of "prime worlds" which are left undescribed, the option of bringing in extra planes, minor planes and plane shards, and leaving th [...]
February 7th, 2016
I'm a Planescape fan from way back, and Sig totally channeled that Planescape feeling for me without being a simple rehash or clone. I love the planar cosmology that Sig presents, and love the city at least as much. The book is colorful, well pr [...]
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File Last Updated:
October 01, 2017
This title was added to our catalog on February 07, 2016.