The Vaulters Expansion adds the titular Vaulter civilization, which is a fan-favorite race and stape of the Endless series, to the game.
Amplitude Studios and SEGA have been quite quiet about what is coming to Endless Space 2 in 2018 so far.
The Vaulters have the ability to teleport and use a super colonizer ship called the Argosy, which spices up gameplay.
That changed today though, as the developer revealed a free-add on for the game alongside the Vaulters Expansion, which will be added to the game on January 25.