Lightspeed: Old Earth Empires is a supplement for the Lightspeed space opera rpg that details the Old Earth Empires, which after the Core Wars were eclipsed by the emergence of the Pan Solar Empire and the Interstellar Federation. Newly aggressive, the five nations of the Old Earth Empires are poised on the brink of war, and consist of Imperial Japan, the United States, the European Union, the African Consortium, and Brazil. Includes histories, law enforcement, militaries, 26 NPCs, 24 starships, 7 vehicles, 1 alien race, and rules for creating law enforcement officers and agents, military personnel, and nobles.