A stage event at the Dengeki Bunko Autumn Festival

A stage event at the Dengeki Bunko Autumn Festival 2011 revealed that Reki Kawahara's light novels would get video game adaptations.[60] The first Sword Art Online adaptation, titled Sword Art Online: Infinity Moment (ソードアート・オンライン -インフィニティ・モーメント- Sōdo Āto Onrain: Infiniti Mōmento?), was developed by Namco Bandai Games for the PlayStation Portable.[61] The game follows an alternate storyline, in which a glitch causes Kirito and the other players to remain in Sword Art Online despite defeating Heathcliff, Cosplay Costumes and players from other VMMORPGs such as Leafa and Sinon get sucked into the game themselves.[62] The game was released in both regular and limited edition box sets on March 14, 2013.[63]

Sword Art Online: Hollow Fragment is a PlayStation Vita game released in Japan on April 24, 2014 rated C on the CERO rating scale.[64][65] Sword Art Online: Hollow Fragment takes place in the same alternative storyline as Sword Art Online: Infinity Moment,[66] and it includes all content of "Floor Clearing" from that previous game[67] with the addition of new unexplored "Hollow Area" of Aincrad.[68] The protagonist Kirito will cross swords with Sword Art Online Costumes a mysterious player who would become one of the key characters in the game.[68] The game sold 145,029 physical retail copies within the first week of release in Japan, topping the Japanese software sales charts for that particular week.[69] The game had also been released in Taiwan by Namco Bandai Games Taiwan with Chinese and English subtitles.[70] A digital-only North American, European and Australian release was released in August 2014.

A third video game developed by Artdink[71] and titled Sword Art Online: Lost Song was released in Japan on March 26, 2015[72] on the PlayStation 3 and Vita platforms,[73][74] with an English version being released in Asia.[75] The game's producer revealed in October 2014 that the game is an open-world action RPG featuring an original storyline, set within Alfheim Online, Cosplay Costumes where characters are able to fly.[76] The game sold 139,298 physical retail copies on the PlayStation Vita in addition to another 55,090 units on the PlayStation 3 within its first week of release in Japan, ranking second and sixth place respectively within the Japanese software sales charts for that particular week, narrowly behind Bloodborne taking the top spot.