Bandai Namco will release a PSP game from the anime Sword Art Online, called Sword Art Online : Infinity Moment. Release date will be on 14 March 2013.
From the video previews, it seems that this game will not be retelling the story from anime. Rather, it occurs in an entirely new world (town with 76 levels?). Possibly, this might also be the continuation from the anime or a side story after the anime finishes.
Gameplay looks similar to .hack game in PS2 with a touch of Persona 3 ‘bonds’ system.
I think most SAO fans will be excited with this game since the anime received a lot of success and requests for sequels.
Here are some previews released by Bandai Namco so far