For those who are new to Sword Art Online, here's a plot synopsis written by Buhssuht.
Technological innovation named Nerve Gear allows players to enter virtual world, achieving the true immersion. Soon after the invention of Nerve Gear, beta invitations of MMO named Sword Art Online are sent to numerous players. The game was fun to play until player realized that they cannot log out of the game. Suddenly Akihiko Kayaba, the creator of Sword Art Online appears and announces that everybody in the game are trapped within, and cannot leave the game until they defeat boss at top of dungeon, and if they were to remove Nerve Gear by force before defeating the final boss or die within the game, they would permanently die in real world. As parting gift, Akihiko leave mirrors to each players, which reveals players' real face causing more panic. Among them is a boy named Kirito, who determines to reach the final dungeon and leave the game no matter what.
The game takes place during the last 25 floors that Kirito and his gang did not cover in the anime series. Then, the Sword Art Online virtual gaming system begins to corrupt those floors making new obstacles for the young heroes to clear.
The PSP game is scheduled to released on March 14, 2013 in Japan. The regular version costs 6,280 Yen ($78.98), and the limited edition costs 9,980 Yen ($125.55).
The bundle's contents includes the following:
The limited edition includes a "Together with Asuna Aincrad Date Edition" where players (as Kirito) can ask Asuna out in a SIM type fashion.
As part of the hype surrounding the Sword Art Online PSP game, COSPA has released images of t-shirts.
Note: This is a compilation of several news articles on this game to save time.