Aion, or Aion: The Tower of Eternity, is a Korean massively multiplayer online role playing game or MMORPG. The game is set in a planet called Atreia. This planet is comprised of two hollow hemispheres with a tower at its center that acts as its axle, called the Tower of Eternity. From this tower shines Aion, the planet’s life source. Life resides inside the planet’s hollows while the outer surface is a barren wasteland.
In this game, players start by assuming the role of a member of one of the four primary classes on the planet: Mage, Priest, Warrior, or Scout. After the player has reached the tenth level, he or she must choose which of the two specialized associated classes to play next. Mages can choose from Spiritmaster or Sorcerer; Priests can become a Chanter or a Cleric; Warriors can choose from a Gladiator or a Templar; and Scouts can become either a Ranger or an Assassin.
Players may form a group of six and work as a team during battle. Groups may join three other groups to form an Alliance; eight Alliances can band together to form a League. Players can go on three different types of quests, namely campaign, ordinary, and Work Orders. Players earn rewards and experience points every time they go on campaigns and quests.