Overlord

Modify a vassalization contract

Scrapped an organic fleet to the salvager enclave

Pledge secret fealty to another empire and have them win an Allegiance War

Have a network of at least 30 Hyper Relays, in systems you own, connected to your capital

Catapult a military fleet directly into the capital system of an enemy empire you are at war with

Own a Fortress World + Planetary Defense Shield + orbital ring with defensive mods + power of 10k

Have a tier 3 subject of each Specialist type simultaneously

Be the patron of three maximum sized Mercenary Enclaves.

As a Subterranean empire, dig too deep, but prove yourself worthy

As Slingshot to the Stars empire, send 10 crewed science ships to the unknown with Quantum Catapults

As a Teachers of the Shroud empire, prove that the Shroudwalkers made a terrible mistake