A downloadable SRD

This Systems Reference Document (SRD) is aimed at artists, designers, writers, and publishers who’d like to build on and/or adapt the rules and ideas found in Beak, Feather, & Bone, a tabletop roleplaying game by Tyler Crumrine.

The BFB SRD includes the core mechanics for playing a game of Beak, Feather, & Bone, which are available for use under the Creative Commons Attribution 4.0 (CC-BY) License. What it doesn’t include are any of the specific play examples, worldbuilding, or artwork from the full Beak, Feather, & Bone publication. You must create your own original material when using the Beak, Feather, & Bone system as a base.

Once you’ve created your own game, supplement, sub-system, or minigame based on the material within the BFB SRD, though, you are free to create, distribute, and sell that derivative work to your heart’s content.


  • a genre re-skin of Beak, Feather, & Bone
  • additional communities for use in BFB games
  • map-packs intended for use with BFB
  • additional rules to expand on existing BFB play
  • a session zero minigame in your own RPG

and much more!

All that we require is that you make a clear statement that your game is based on BFB’s material.  This document contains the text required for that statement, a break-down of BFB's core mechanics, and tips on naming, art direction, and style.

This document is free in perpetuity! If you'd like to give us a tip, though, consider buying one of our other games


BFB SRD.pdf 1 MB
BFB SRD.txt 12 kB

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