A role-playing game (RPG) is a type of game in which players assume the roles of characters in a fictional setting. Players take on the personas of these characters and interact with each other and the game’s story and the world through improvisation and guided decision-making. The game is usually led by a Game Master (GM) who acts as the narrator, storyteller and referee for the game.
Introduction
The RPG glossary is a series of works from different websites and all credit goes to them and their hard work. Copied across to just make cross-referencing here easier. This site is using the information for reference and if in any doubt do go visit the pages themselves as they host a lot of great content and provide a lot of useful resources.
Besides the terms listed here, there are numerous terms used in the context of specific, individual RPGs such as Dungeons & Dragons (D&D), Pathfinder, Fate, and Vampire: The Masquerade.