A group of kids living in an Asian-inspired fantasy world are at the centre of the animated television program of the same name. In this world, people can control one of four classical elements: Air, Water, Earth, and Fire. The Avatar is a person who can control all four elements and is charged with keeping the peace between the four nations. 100 years ago, the Avatar had disappeared, allowing the Fire Nation to wage war across the world.
The new Avatar, Aang, has been found, and now he must travel the world, learning how to bend all four elements and fighting against the Fire Nation alongside his friends Katara (a Waterbender of the Water Tribe) and Sokka (her older brother). The player can choose one of four characters: Aang, Katara, Sokka, and Haru (an Earthbender). Each character's fighting style and abilities are unique, and new abilities can be gained as they earn experience by defeating enemies. Items are also available to assist the player, such as armor, chi, accessories, and healing potions.
The gameplay is viewed from a top-down perspective, with the player battling enemies and searching for specific items required to complete the quests necessary to progress further into the game. The story unfolds over several chapters, and players cannot return to previous areas. Set between the first and second seasons of the show, the game follows Aang and friends as they investigate the disappearance of a young Waterbender, and find themselves in pursuit of an inventor named Lian the Maker, who has been forced to create dangerous machines for the Fire Nation .