The d20 System is a role-playing game system published in 2000 by Wizards of the Coast, originally developed for the 3rd edition of Dungeons & Dragons. The system is named after the 20-sided dice which are central to the core mechanics of many actions in the game.
A generic or universalrole-playing game system is a role-playing game system designed to be independent of setting and genre. Its rules should, in theory, work the same way for any setting, world, environment or genre in which one would want to play.
Open gaming is a movement within the tabletop role-playing game (RPG) industry with superficial similarities to the open source software movement. The key aspect is that copyright holders license their works under public copyright licenses that permit others to make copies or create derivative works of the game.
The Open Game License (OGL) is a public copyright license by Wizards of the Coast that may be used by tabletop role-playing game developers to grant permission to modify, copy, and redistribute some of the content designed for their games, notably game mechanics. However, they must share-alike copies and derivative works.
In the open gaming movement, a System Reference Document (SRD) is a reference for a role-playing game's mechanics licensed under the Open Game License (OGL) to allow other publishers to make material compatible with that game.
PCGen is a character creation and role-playing game playing aid program for d20 System-based games, such as Dungeons & Dragons.
Green Ronin Publishing is an American company based in Seattle, Washington. Founded in 2000 by Chris Pramas and Nicole Lindroos, they have published several role-playing game–related products. They won several awards for their games including multiple Origins, ENnie, Pen & Paper, and Inquest Fan Awards.
Mongoose Publishing is a British manufacturer of role-playing games, miniatures, and card games, publishing material since 2001. Its licenses include products based on the science fiction properties Traveller, Judge Dredd, and Paranoia, as well as fantasy titles.
Scarred Lands is a post-apocalyptic fantasy campaign setting in which characters live in a world recovering from a devastating war between gods and titans. Initially published by White Wolf Publishing under its Sword & Sorcery brand using the d20 System, Scarred Lands is now owned by Onyx Path Publishing. In 2017 Onyx Path Publishing released an updated version of the setting using the 5th Edition Open Game License system along with a version of the core setting book using the first edition of the Pathfinder Roleplaying Game rules. Scarred Lands draws inspiration from Greek mythology.
Paizo Inc. is an American role-playing game publishing company based in Redmond, Washington, best known for the tabletop role-playing games Pathfinder and Starfinder. The company's name is derived from the Greek word παίζωpaizō, which means 'I play' or 'to play'. Paizo also runs an online retail store selling role-playing games board games, comic books, toys, clothing, accessories and other products, as well as an Internet forum community.
Goodman Games is an American game publisher best known for the Dungeon Crawl Classics series of adventure modules and role-playing game, its science fiction offshoot Mutant Crawl Classics, and Original Adventures Reincarnated, a line of updated, annotated, and expanded republications of classic RPG adventures and supplements, mostly from TSR, Inc.'s Advanced Dungeons & Dragons. Additionally, Goodman Games produces RPGs using versions of the DCC rules for Fritz Leiber's Lankhmar and Jack Vance's Dying Earth settings, under license. The company has also produced licensed adventures for Wicked Fantasy Factory, Judges Guild, Xcrawl, Iron Heroes, Castles and Crusades, and Death Dealer.
Pathfinder is a line of roleplaying game supplements published by Paizo Publishing since 2007. Originally designed for use with the revised 3rd edition of Dungeons & Dragons, they transitioned to the first edition of the Pathfinder Roleplaying Game in 2009, then to the second edition of Pathfinder in 2019.
The Game System License is a license that allows third-party publishers to create products compatible with and using the intellectual property from the 4th edition of Dungeons & Dragons (D&D). It was released to the public by Wizards of the Coast (WotC) on June 17, 2008.
The Pathfinder Roleplaying Game is a fantasy role-playing game (RPG) that was published in 2009 by Paizo Publishing. The first edition extends and modifies the System Reference Document (SRD) based on the revised 3rd edition Dungeons & Dragons (D&D) published by Wizards of the Coast under the Open Game License (OGL) and is intended to be backward-compatible with that edition.
Jason Bulmahn is an American game designer who has written or contributed to several works.
Owen K.C. Stephens is a game designer who has worked on a number of products for the Starfinder, Pathfinder and Star Wars Roleplaying Game and other games.
Free RPG Day is an annual promotional event by the Tabletop role-playing game industry. The event rules are fairly simple: participating publishers provide special free copies of games to participating game stores; the game store agrees to provide one free game to any person who requests a free game on Free RPG Day.
Ryan S. Dancey is a businessman who has worked primarily in the collectible card game and role-playing game industries. He was vice president in charge of Dungeons & Dragons at Wizards of the Coast.
Jonathan M. Thompson was a game designer.
Kobold Press, also known as Open Design, is an American game company that produces role-playing games and game supplements.
