This is a guide to the Dune universe, particularly the planet of Arrakis (also known as Dune), during the time of the Harkonnen occupation. It’s intended to be used by anyone running a role-playing game set in the Dune universe. Much of the information presented here is taken from the series of books by Frank Herbert, but some of it has been created by the author. This document is based on campaigns that the author has run using GURPS and QAGS, but the information contained should be readily adaptable to other rules systems.