The world of Atreia is inhabited by two playable factions, the Asmodians and the Elyos, along with a third non-playable faction (the Balaur).
- The Asmodians: The Asmodians are a brave and hardy people, separated from the Elyos by the Epic Cataclysm and plunged into a world of darkness and despair.
- The Elyos: The Elyos occupy the lower half of Atreia, known as Elysea. After the Epic Cataclysm, they found themselves bathed in sunlight for over 750 years and, as a result, have transformed into a beautiful and radiant people.
- The Balaur: The term “Balaur” invokes images of terror and fear for the level of destruction that they caused, and continue to cause, in Atreia.