The Niraxian Imperial Assimilation Directive is a long-lasting political directive established by the Niraxian Empire for thoroughly searching through and conquering worlds for the benefit of the Empire. This includes assimilating races who have not been recognised by the Orion Forum into becoming slaves for work in the Niraxian Mining Sectors.

Originally beginning in 459 CE under the reign of the Fourth Sydonan Emperor Arkheus the Dominator, the Directive has led to the conquest of hundeds of planets, with an additional ten races assimilated for servitude. After severe backlash from the galactic community, the Directive was shut down by the imperial government. It would later be restarted by Emperor Akriontra Sydona and his son Nikriontra sent to Earth.