Principia Apochrypha

A Module for Foundry Virtual Tabletop

Author: Snowfall Project Source: Project URL Version 10 Last Updated 2 months, 3 weeks ago

Principia Apochrypha

Principles of Old School RPGs, or, A New OSR Primer

This is the Principia Apochrypha, a free book on running TTRPGs in the old-school style. It has been converted to Foundry VTT JournalEntry format.


Official site for the book:

Foundry v10 compatibility

The module works in Foundry v10, but has not yet been updated to the v10 JournalEntry format.



This work may be freely distributed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.


Available Versions

  1. Version 1.0.4

    Compatible Foundry Versions: 0.6.0 - 10 Installation Link: Manifest URL Update Notes: Read Notes