Sankaku Channel/sword art online: hollow fragment

Sword Art Online: Hollow Fragment (ソードアート・オンライン －ホロウ・フラグメント－ Sōdo Āto Onrain: Horō Furagumento) is a video game for the PlayStation Vita based on the Sword Art Online light novel series. It is the second video game in the series, the first being Sword Art Online: Infinity Moment. The game was released in Japan on April 23, 2014, Taiwan/Hong Kong on May 29, 2014, North America on August 19, 2014 and Europe and Australia on August 20, 2014.

A sequel titled Sword Art Online: Lost Song has been announced for a 2015 release on the PlayStation 3 and Vita platforms.

The game has over 100 recruitable characters which can be chosen to accompany the player in the game's dungeons. Gameplay combines elements of a MMORPG—albeit in a simulated fashion as it is not an online game, though it does include limited multiplayer via ad hoc for up to four players—as well as elements of a dating sim.

The game takes place in the same continuity as the prior game in the series, Sword Art Online: Infinity Moment, which exists in an alternate storyline from the Sword Art Online anime storyline. The player controls the main character Kirito, who has been trapped in a MMORPG where dying in the game will lead to his death in real life as well. Part of the game is actually a high definition recompilation of Sword Art Online: Infinity Moment, the original game in the series released for the PlayStation Portable, including all content of "Floor Clearing" from the previous game with the addition of new unexplored "Hollow Area" of Aincrad.