The Vaulters Add-on for Endless Space 2 - Digital Deluxe Edition has 9 achievements.
You have unlocked the Endless archivist; the being that watches the watchers…
Complete the Vaulters faction lore quest
Destroy 4 Pirate Lairs in a single game
Win with the Vaulters
As the Vaulters, teleport a Fleet of 7 CP (or more) to a Pirate Lair
As the Vaulters, colonize Auriga and assign OPBOT as its System Governor
Assimilate the Sisters of Mercy minor faction by invading their system
Use Boarding Pods to hijack a Pirate Ship
Buy 5 Pirate Marks in a single game