Avatar The Last Airbender Sozin’s Echo Relive the story of the Avatar against the Fire Nation and Sozin’s Comet! Assemble Aang and his friends to battle your foes and defeat the Fire Lord! In the free online roleplaying game, Avatar The Last Airbender: Sozin’s Echo, new abilities, new bosses and new characters will be introduced. Use your newfound abilities and those of the new Avatar characters to battle. Together, Aang, Sokka and Katara can band together and beat the enemies.