The Palladium Books Rifts RPG Dimension Book 6 Three Galaxies Sourcebook is a role-playing game supplement published in 2004 by the United States-based brand Rifts. This sourcebook delves into the Three Galaxies setting, providing players and game masters with additional content and options for their Rifts RPG campaigns. With its focus on storytelling, character development, and immersive gameplay, this product is a valuable addition to the Rifts RPG universe.