Assault on Balaurea introduces the game's passionate fans to the next exciting chapter of Aion in which characters align together to launch a massive counter assault against the invading Balaur in their homeland. Along with the ability to explore new and updated zones and instances, the expansion provides players with an increased level cap, new weapons, items and skills as well as enhanced flight mechanics. Because exploring is never fun alone, Aion introduces completely unique, functional pets equipped with in-game benefits to keep characters company along the way.

* New Instances: Aion hosts eight new instances each filled with fantastic challenges and enticing rewards. These new instances experienced at both lower and higher levels offer a range of challenges for all varieties of players ranging from solo adventures to full-on Legion raids.
* Pets: Pets are no longer only decorative. Aion redefines how MMORPGs approach pets, creating an entire new subsystem for players to explore as they acquire functional pets capable of storing goods, assisting with crafting or acting as guardians by alerting their masters to nearby enemies. Pets are acquired through in-game purchases, quest rewards, item drops, NCsoft Store, and special promotional events.
* New Zones: Players will explore the vast lands of Balaurea, the home of the Balaur, ruled by the Dragon Lord Tiamat. The Asmodians and Elyos have established fortresses in the two new zones: Gelkmaros and Inggison, each area featuring completely new environments, powerful monsters and unique flight mechanics for players to enjoy.
* Increased Level Cap: Five additional levels can be achieved. With an increased level cap of 55, characters will discover new weapons, earn new items and learn new skills as they explore the dangerous lands of Balaurea.
* Enhanced Flight Mechanics: Brand new flight options in the form of Windstreams allow characters to traverse the vast new zones of Gelkmaros and Inggison with increased speed and unlimited flight time. Windstreams have varying strengths and effects, adding a further layer of depth and strategy to Aion's highly-acclaimed flight mechanics.
* Twitter Integration: Aion's new Twitter feed functionality makes player bragging rights easy with its fluid integration into the game. Players can capture and Twitpic up to ten of their favorite screen shots using the updated in-game UI.