At the Tokyo Game Show 2017, Bandai Namco announced Sword Art Online: Integral Factor. The user of iOS and Android can download the game for free, however there are in-game micro-transactions. The game’s protagonist isn’t the series of protagonist Kirito, thus s/he has no name.
Pre-registration is already available over the game’s official website.
Here’s the Sword Art Online: Integral Factor announcement trailer.