An Open Game (or Double King's Pawn Opening) is a generic term for a family of chess openings beginning with the moves: 1. e4 e5 White has moved the king's...

Open gaming is a movement within the tabletop role-playing game (RPG) industry with superficial similarities to the open source software movement. The...

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...

about the game world, with the open-world game using strategic storage and memory techniques to load the game world dynamically and seamlessly. Open-world...

An open-source video game, or simply an open-source game, is a video game whose source code is open-source. They are often freely distributable and sometimes...

Semi-Open Game is a chess opening in which White plays 1.e4 and Black breaks symmetry immediately by replying with a move other than 1...e5. The Semi-Open...

actions in the game. Much of the d20 System was released as the System Reference Document (SRD) under the Open Game License (OGL) as Open Game Content (OGC)...

The game has won multiple awards and has been translated into many languages. Dungeons & Dragons is a structured yet open-ended role-playing game. It...

Open Game Art is a media repository intended for use with free and open source software video game projects, offering open content assets. Its purpose...

role-playing game (typically abbreviated as TTRPG or TRPG), also known as a pen-and-paper role-playing game, is a classification for a role-playing game (RPG)...