From the introduction: Welcome to the world of Greyhawk Reborn (GHR). Greyhawk Reborn is an organized play campaign that uses the Dungeons and Dragons 5th Edition ruleset and the Warduke Press Organized Play System to provide a unique, character centered play experience in a shared world where the decisions of the players have direct impact on the events of the story. As a player, everything you need to get started, other than a Player’s Handbook, can be found here.