Also known as: ロスト・ソング
Sword Art Online: Lost Song (ソードアート・オンライン －ロスト・ソング－) is a 2015 action RPG game published by Bandai Namco for the PS3, PS Vita, PS4 and PC based on the Sword Art Online series. The game has an alternate storyline based on the Fairy Dance arc setting.