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Open Core Role Playing System Classic
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Open Core Role Playing System Classic

Watermarked PDF
Suggested Price $4.95

The Open Core System is derived from the best of today’s Open Gaming Content, creating a new, strong, coherent and flexible role-playing game system - it’s the house rules you’ve been waiting for. The Open Core System is effects-based to help you create that “perfect” character using attributes, skills, abilities, and disabilities. The Open Core System is “classless,” a point-based system that can allow players and GMs to create a wide variety of characters and world. The Open Core System can handle a wide spectrum of genres “right out of the box,” from science fiction to super-heroes to anthropomorphics to classic fantasy. The Open Core System uses a simple, time-proven base mechanic: 3d6 + Attribute + Skill VS. Target Number. Variant rules for other dice (1d20, etc.) are included. It’s easy to convert characters and campaigns from other popular open gaming systems to the Open Core System. The Open Core System is fully extensible; Open Content from other systems can easily integrate into the Open Core System.

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Reviews (6)
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September 11th, 2014
Out of the 197 pages, 190 are the book. It was added here on August 15, 2005 (9 years ago!). Since then, no updates, or any support, etc. I've checked their site ( nothing there. After reading the other reviews, I have to agree [...]
May 7th, 2014
It was looking good, until I read the STR chart. How the hell did they derive those numbers from the STR stat? It looks like they pulled numbers out of their ass for levels 1-10. I was hoping to use it for superhuman characters, where I knew how much [...]
Timothy B. [Featured Reviewer]
April 17th, 2012
Open Core is based on the OGL but differs quite a bit from it. It is designed to allow the GM to create his/her own game with the tools provided. It uses basic roll system; 3d6 + Attribute + Skill. (or even 1d20 + Attribute + skill). The system is modular [...]
July 7th, 2010
Well first off this isn't a bad system, i rather like the set up. Especially the Attributes and Derived Attributes, this alone gets a thumbs up because i am so tired of the usual d20 OGL rip off. And this introduces a albeitly simular scores, the ability [...]
March 21st, 2008
I felt that this was an easy and painless prosses that I would repeat anytime I wish to purchase books. [...]
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2.4 MB
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File Last Updated:
August 15, 2005
This title was added to our catalog on August 15, 2005.
Publisher Info
Battlefield Press
Battlefield Press
Publisher Average Rating