The Quilwosx Incident: Force a humiliating peace on a Fallen Empire.
For the Furrderation: Have a federation of five mammalian empires and no other species
A Deal with the Devil: With an all extremist Ethos empire, ally another empire with the opposite extremist ethos.
The United Planets: Have all nations be a part of a single federation.
I am the Federation: As a monarchy, assume dictatorial power in a federation.
Love you like a toaster: Be at peace and amicable with an AI subspecies for 100 years.
Flesh is a Design Flaw: As an AI empire, modify ten different biological species.
Faux Pas: Insult an empire to have them declare war the next day.
I am your fatherland: Have five empires willingly join yours.
Join the Dark Side: As a xenophobic militaristic empire, diplomatically annex a pacifist democracy.
Snatch Defeat from the Jaws of Victory: As a larger and superior fleet, lose a battle decisively.
Well I didn't vote for you: As a democracy in a federation, have another nation assume dictatorial power in that federation.
Arsenal of Democracy: As a pacifist democracy lead in military production.
Rich Biodiversity: Have all of your scientists, governors, and admirals be of different species.
There may be unforeseen consequences: Trigger an extradimensional invasion.
Alternative Colonial Policy: Successfully invade a planet before building your first colony ship.
Electric Sheep: As an AI empire, have maximum spirituality.