The Pathfinder Roleplaying Game is a fantasy role-playing game that was published in 2009 by Paizo Publishing. The first edition extends and modifies the System Reference Document based on the revised 3rd edition Dungeons & Dragons published by Wizards of the Coast under the Open Game License and is intended to be backward-compatible with that edition. The first major revision of the ruleset, Pathfinder 2nd Edition, was released in August 2019.