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RPJ Core
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RPJ Core

Suggested Price $4.99

RPJ Core is a generic tabletop roleplaying engine. Rather than provide rules for every circumstance, it pushes some implementation details down to modules, complete games which build on top of it.

Philosophically, RPJ charts a course between narrative and simulationist games, blending elements of both. Players have tools to affect the fiction when it clashes with their character concepts, and gamemasters have options to abstract conflict when the detailed rules don't capture the drama. At the same time, a traditional skill-based design under the hood permits gamemasters to zoom in on tasks which require detail.

This is a prerelease product. Major rules changes are unlikely, but still possible.

Key Features

  • Level-less, skill-based character system
    RPJ characters are the sum of their skills: given proper investment, any character can be good at anything. At the same time, a lightweight character class system helps to guide and focus character builds.

  • Streamlined combat and damage
    Combat occurs in a gridless framework based on large regions, using a simple adjacency system to determine who is close to whom. Damage is resolved using a saving throw system: when receiving damage, characters roll to shrug it off.

  • Modern ranged combat rules
    An optional system for cover, suppressive fire, and more fills in the gaps for combat using firearms and other modern and futuristic weapons.

  • Magic, conditions, and more
    Extensibility is a central RPJ design goal. Not only does it leave room for modules to implemnt their own systems, it provides some example optional mechanics suitable for cribbing, including two options for magic and special abilities, along with streamlined, genre-agnostic money and inventory systems.

  • Permissive licensing
    RPJ's core mechanics are provided under the Creative Commons Attribution-Sharealike-Noncommercial license, so that they remain freely available to all. Its optional mechanics, however, are provided under the Creative Commons Attribution license, so that they can be readily copied, remixed, and included in commercial products.
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Product Information
Rule System(s)
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File Size:
3.76 MB
Original electronic
Scanned image
These products were created by scanning an original printed edition. Most older books are in scanned image format because original digital layout files never existed or were no longer available from the publisher.

For PDF download editions, each page has been run through Optical Character Recognition (OCR) software to attempt to decipher the printed text. The result of this OCR process is placed invisibly behind the picture of each scanned page, to allow for text searching. However, any text in a given book set on a graphical background or in handwritten fonts would most likely not be picked up by the OCR software, and is therefore not searchable. Also, a few larger books may be resampled to fit into the system, and may not have this searchable text background.

For printed books, we have performed high-resolution scans of an original hardcopy of the book. We essentially digitally re-master the book. Unfortunately, the resulting quality of these books is not as high. It's the problem of making a copy of a copy. The text is fine for reading, but illustration work starts to run dark, pixellating and/or losing shades of grey. Moiré patterns may develop in photos. We mark clearly which print titles come from scanned image books so that you can make an informed purchase decision about the quality of what you will receive.
Original electronic format
These ebooks were created from the original electronic layout files, and therefore are fully text searchable. Also, their file size tends to be smaller than scanned image books. Most newer books are in the original electronic format. Both download and print editions of such books should be high quality.
File Last Updated:
March 02, 2019
This title was added to our catalog on February 05, 2019.
Many Words Press
Publisher Average Rating