While the game only recently released in Japan on the 24th of April, it was released as both a physical copy, and as a digital copy. It has been announced nearly a few days prior, that the game will be coming to North America during the summer of 2014 as a digital-only title for the PS Vita. The game has not been announced for Europe. Hopefully it sees a release soon after the North American release.
Gameplay Description: Its gameplay system is similar to the Infinity Moment's gameplay system. However, a burst gauge, which allows continuous attacks as long as the player has enough burst energy left, was added to its battle system. Also, the system allows each player to create their own non-player character to battle alongside with, as well as linking up with a maximum of 4 other players who are playing the game on the PlayStation Vita to play the game simultaneously, allowing players to form their own raid teams. A region, called Hollow Area, that was added to the game is designated for such multiplayer gameplay.
Other Information: There’s also a dating element in the game, and dates will sometimes end with pillow talk. Single-player aside, though, Hollow Fragment also has a multiplayer mode, where you can have a party of four players with one AI partner each, making for a team of eight.

Sources: Siliconera, Sword Art Online Wiki.

The excitement is flowing. I just wish there was going to be a physical release for the game, even if only for a limited print run. 

This game has been released. Closing thread.