This galaxy is ancient, and its first intelligent life was the civilization we call the Endless. Long before our eyes gazed upon the stars they flew between them, though all that remains of this people is what we call Dust. A substance found scattered or in forgotten temples, it once gave powers to admirals and galactic governors. The galaxy will belong to the faction that can take control of the Dust and uncover its secrets… 

Disharmony DLC:

Disharmony brings a brand new experience to Endless Space players. A new faction with a unique play style, “The Harmony”, will make its appearance. Battles will be even more intense with the addition of fighters and bombers, battle formations, a new targeting system, a redesigned weapon system and enhanced invasion mechanics. The AI opponents will be significantly more unpredictable with the implementation of the new ‘Adaptive Multi-Agent System’. Prepare your empire for epic space battles!

• A brand new Faction called “the Harmony” with a single objective in mind: Annihilate Dust! 
• New Fighter and Bomber units that will completely change the shape of combats, especially with the new Battle Formation and Targeting systems 
• A complete rework of the Ship Design interface, including an improved Weapon System that provides family types for modules (melee, medium range and long range) 
• New Invasion mechanics have been added: Prepare your population for Bombardments, Sieges and land Invasions! 
• Expect to face a real challenge when playing against AI opponents with the New Adaptive Multi-Agent System (AMAS) 
• Many other additions and features voted or requested by the community including:
  • Four new Heroes 
  • A new option to disable Exchange of Technologies, as a request from the Multiplayer community!