'A highly evolved form of a lowly species, these colorful beings come from an ocean world. These factions will interact with each other through Diplomacy. Players are allowed to create their own Custom Factions based on the built-in Factions. Upon Amplitude's completion of the Vaulters, they were released via free DLC. The Vaulters faction is a formerly unfinished faction accessible through the Founder Edition of Dungeon of the Endless. The Harmony faction was added in the expansion pack Endless Space: Disharmony. The faction was created by Panzer, a member of the Endless Space community. The Automatons faction was added in the ' Rise of the Automatons' free add-on. The Sheredyn faction is a special faction included with the Emperor Edition of the game, but is functionally identical to the United Empire unless Endless Space: Disharmony has been downloaded, in which case it gains its own unique traits.
Each has their own history and unique traits and bonuses. Endless Space featured 8 playable factions at launch, and currently features 12 unique playable factions.
