Sunday, February 12, 2023

Is what unites us is Jason Flynn Kemp's Cepheus Engine Compatibility-Statement License?

Basically, as I'm learning more about ORC and CC I'm realizing CSL's role in making a MARKET - the CE market allowing people to make cross-compatible products matters more than the OGL. 


Clarification: CE can never remove the OGL as part of it. BUT NON-OGL (CC-BY-SA) Game Systems and Settings can Follow Jason Flynn Kemp's CSL and be compatible. I will be removing the CE text from the Tech Levels, Redefining the Port Codes (X to A). I'll be doing all the same for the Variant Combat Rules and all moving forward. 

Mneme will be a CC-BY-SA product that will follow the CSL license for compatibility. We will avoid the Other IP. By doing this - FUTURE TRPGs can just build from the rules - not having to rewrite the expressions they don't need to change for their version.  

This is because someone was explaining to me I have to remove everything in Section 15 in the OGL 1,0a.


Open Game License v 1.0a Copyright 2000, Wizards of the Coast, Inc. 

  1. High Guard System Reference Document Copyright © 2008, Mongoose Publishing.

  2. Mercenary System Reference Document Copyright © 2008, Mongoose Publishing.

  3. Modern System Reference Document Copyright 2002-2004, Wizards of the Coast, Inc.; Authors Bill Slavicsek, Jeff Grubb, Rich Redman, Charles Ryan, Eric Cagle, David Noonan, Stan!, Christopher Perkins, Rodney Thompson, and JD Wiker, based on material by Jonathan Tweet, Monte Cook, Skip Williams, Richard Baker, Peter Adkison, Bruce R. Cordell, John Tynes, Andy Collins, and JD Wiker. 

  4. Swords & Wizardry Core Rules, Copyright 2008, Matthew J. Finch

  5. System Reference Document, Copyright 2000, Wizards of the Coast, Inc.; Authors Jonathan Tweet, Monte Cook, Skip Williams, based on original material by E. Gary Gygax and Dave Arneson.

  6. T20 - The Traveller’s Handbook Copyright 2002, Quiklink Interactive, Inc. Traveller is a trademark of Far Future Enterprises and is used under license.

  7. Traveller System Reference Document Copyright © 2008, Mongoose Publishing.

  8. Traveller is © 2008 Mongoose Publishing. Traveller and related logos, character, names, and distinctive likenesses thereof are trademarks of Far Future Enterprises unless otherwise noted. All Rights Reserved. Mongoose Publishing Ltd Authorized User.

Basically, very few of these apply to Mneme Variant rules! and what I want is really just people knowing my products work with Cepheus Engine ecosystem. Mneme relationship with CE is more important than its Relationship with Traveller.  Traveller is the BIGGEST market for SCIFI TRPG but CE and Open Source / Creative Common products like the tools Mneme team will grow in the next 20 years under OPEN GAMING. 

Realizing the CSL is the most important part- Access to people who find the tools easily compatible. 

The Cepheus Engine Compatibility-Statement License (CSL)

  1. You must state on the first page where you mention Cepheus Engine that “Cepheus Engine and Samardan Press are the trademarks of Jason "Flynn" Kemp,” and that you are not affiliated with Jason "Flynn" Kemp or Samardan Press™.

  2. If you’re using the license to commit legal fraud, you forfeit the right to continue using the license: specifically, if you are claiming compatibility with the rules of Cepheus Engine, the claim must not constitute legal fraud, or fraud in the inducement, under the laws of the State of Texas. Note that this requirement is almost impossible to violate unintentionally—it’s largely intended to keep me out of trouble, not to restrict legitimate statements of compatibility.

  3. You must comply with the terms of the OGL if the terms apply.

  4. Your cover must include the words “House Rules” or “Variant Rules” or "Alternate Cepheus Engine Universe" near the title if the document is a full, free-standing game that includes modifications. Feel free to contact the author if you wish to use a different form of disclaimer.

  5. Selling a full version of this game with your house rules incorporated into it is perfectly permissible, but you may not sell an effectively unchanged copy of the rules for money.

  6. If your document is a private house rules document, not being sold for profit or general use, you may scan and use artwork (including the cover) from the printed version, published in print under the title of Cepheus Engine Core Rules, provided that the cover contains the words “House Rules,” near the title, and that the artists are appropriately credit cross compatible.

  7. Your rights under this CSL cannot be revoked, and are perpetual unless you breach the terms of the license, in which case your rights terminate.

  8. If you comply with the above, you may state that your resource is “for use with the Cepheus Engine Core Rules”, “compatible with the core rules of Cepheus Engine” or “with the Cepheus Engine Core Rules.”

If you have questions about the license, feel free to contact the author.

Legal information

© <PUBLISH YEAR>, by <AUTHOR>. Published under a Creative Commons Attribution-ShareAlike license (CC BY-SA), version 4.0.

This book is published under a CC BY-SA license, which means that you can copy, redistribute, remix, transform, and build upon the content for any purpose, even commercially, as long as you give appropriate credit, provide a link to the license, and indicate if changes were made. If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original. License details:  

Creative Commons License

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Method in the Wiki of Creative Commons how to use this.


Made with Creative Commons 

Dungeon World 

Pretty much how you do it:

Copyright © 2003 <you>

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License (CC-BY 4.0). A copy of this license may be found by visiting this website: (I'd include the CC banner and a QR code like this one (which happens to go to the site in question.)

You cannot HAVE A WORKABLE hard Scifi Setting without OPEN SOURCING it - there will be SO MANY CHANGES and corrections as technology advances. I'm pretty ambitious about this is its My gaming that Lead me to chose Open Source Technology for my Family Business and Advocacy (teaching open Source tech: freeCad, Erpnext, Linux, Blender etc...)- I believe its the future - an Inclusive future where the automation Will hopefully used to HELP transition people as AI will disrupt industries.

AI would probably HELP with the Version Management of this Setting as it will help identify the Changes needed in the documents when a New Technology creates all these changes.  

THe Hobby helping people enhance their Thinking Skills in a FUN WAY has always been a focus of mine. Game in the Brain - people tend to be smarter in games - and its in carrying over the Skill to more practical uses is where GITB finds itself helping in. 


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