Atreia is a fictional world in the MMORPG Aion, developed by NCSoft. It is divided into two main regions, Elysea and Asmodae, inhabited by two opposing factions: the Elyos and the Asmodians. The landscape features diverse environments, including lush forests, towering mountains, and vast plains, all rich in lore and history. The world of Atreia is also known for its unique gameplay mechanics, such as aerial combat and the ability to fly using wings. Players can explore dungeons, complete quests, and engage in player-versus-player battles, all while uncovering the mysteries of their world and its ancient deities.