The North American and European release dates of Sword Art Online: Lost Song have been set for November 17, 2015 and November 13, 2015 respectively. The game, a follow-up to Sword Art Online: Hollow Fragment, will be avaialble for both PlayStation 4 and PlayStation Vita.

Like Hollow Fragment, Lost Song features an alternate storyline to the mainline Sword Art Online anime and light novel series. Lost Song takes place in the fictional VRMMORPG ALfheim Online and is the first in the series to feature aerial-based combat with characters in the game able to fly. The game also allows players to control characters other than main protagonist Kirito and features four-player online multiplayer.