From the introduction: The Entropic Gaming System, or EGS, is a tabletop role-playing game; a set of mechanics that allow you to assume the role of a character within a story for the purpose of living that character’s heroic tales. Powered by a set of homogenous mechanics, it is heavily influenced by games such as Savage Worlds, Legend, FATE, Corporation, and Hollow Earth Expedition. This particular product is the System Reference Document, or SRD. It contains all the base mechanics, available for other publishers to use through the Open Gaming License, common options, and a bit of other things to get you going. It does not offer a setting, environment, adventure, or campaign: you have to create those yourself, use one published by Mystical Throne Entertainment, such as Judgment Day or Ancient World, or a third-party publisher.