Pax Imperia: Eminent Domain is a real-time 4X strategy game developed by Heliotrope Studios and published by THQ in 1997. Set in a randomly generated galaxy, the player takes control of one of eight predefined alien races, or designs a custom species, and expands from a single planet to dominate the universe. The game blends traditional 4X elements (explore, expand, exploit, exterminate) with real-time combat and a detailed research tree of over 230 technologies. Economics, diplomacy, espionage, and ship design are as critical as military strength. Players manage colonies on multiple planet types, balance resource generation, and design warships from researched components. The game lacks scripted campaigns, offering open-ended sandbox conquest against computer opponents or human multiplayer via LAN or direct connection. Praised for its depth and interface once learned, it is often compared to the Master of Orion series but in real time. Its slower pace and emphasis on empire management set it apart from the era's faster real-time strategy titles like Command & Conquer: Red Alert. The CD release includes CGI cinematics and an orchestral musical score that fits the epic scale.