What are the different twenty-sider OGL game systems?
OGL started out as a twenty-sider game. Since then, there have been many twenty-sider spin-offs. Here is a list in alphabetical order of the ones I know. Click on the link to get, either for free or for a fee, a copy of the rules: Anime d20 – published by Guardians of Order [free RTF] Core Elements by Buth Curry; originally created by James D. Hargrove [free PDF] D20 3.5 – published by Wizards of the Coast [free RTF] D20 Modern – published by Wizards of the Coast [free RTF] F20 – published by Chine Games [free PDF] Grim Tales published by Bad Axe Games [free html] Live SRD – created by Levi Kornelsen Mutants & Masterminds 2nd Edition – published by Green Ronin OGL Mongoose – published by Mongoose Publishing* Perfect 20 – published by Postmortem Studios [free PDF] Spycraft 2.0 – published by Crafty Games; originally published by AEG [PDF] True20 – published by Green Ronin * This is my nickname for the various OGL one-shot books that Mongoose has made. I currently can only draw from the
