Seldon's Compendium of Starcraft 3 is a supplement for Space Opera. This 48 page sourcebook provides information on starships of war for the Blarad Starkingdom, Mekpurr, United Ranan Worlds, Hissss'ist, as well as starfighter carriers for all 8 stellar empires in the Space Opera universe. It includes a glossary and scale deck plans (smaller ships only), specifications, and comments for a large variety of military ship classes, from starfighters to battlestarships.