The Empire Engine setting is a future historical record of the first Transcendent Intelligence created to rule the Jovian Red Empire a thousand years after its ascendence within the Solar System...
This Autoempire Mechanosystem rapidly absconds and launches itself to SagA* at a high percentage of lightspeed, ultimately superseding Any human-descended civilizations for eminence of the Milky Way.
With a titanic ever-expanding fraction of the Mass/Energy of the Milky Way's Core formed into a self-replicating Imperium of Gothic Gigascale, the Empire Engine launches a Galactic Reclamation Crusade across the Galaxy and subjugates the remainder of the Milky Way in Totality.