The alternative version to the Caliber SS in volume 8, where they decided not to save Freya in the dungeon. The SS in the title means &#23569;&#12375;&#22833;&#25943; (sukoshi shippai) which translates to Slight Failure.

In the year 2022, gamers rejoice as Sword Art Online - a VRMMORPG (Virtual Reality Massively Multiplayer Online Role Playing Game) like no other - debuts, allowing players to take full advantage of the ultimate in gaming technology: NerveGear, a system that allows users to completely immerse themselves in a wholly realistic gaming experience. But when the game goes live, the elation of the players quickly turns to horror as they discover that, for all its amazing features, SAO is missing one of the most basic functions of any MMORPG - a log-out button. Now trapped in the virtual world of Aincrad, their bodies held captive by NerveGear in the real world, users are issued a chilling ultimatum: conquer all one hundred floors of Aincrad to regain your freedom. But in the warped world of SAO, "game over" means certain death - both virtual and real...
 
(Source: Yen Press)

The goddess Urd is in danger, and only Kirito and his friends can save her! The evil frost giants have invaded her homeland of Jotunheim, bringing death and destruction in their wake. The linchpin of it all is the frost giant king's sword-the legendary weapon Excalibur! If Kirito's crew can make it to the end of the dungeon and pull the sword from the stone, peace will be brought to the land once more!
 
Note: Covers the Calibur Arc from a side story in Volume 8 of the light novel series.
 
(Source: Yen Press)

One year after the SAO incident, Kirito is approached by Seijiro Kikuoka from Japan's Ministry of Internal Affairs and Communications Department "VR Division" with a rather peculiar request.

That was an investigation on the "Death Gun" incident that occurred in the gun and steel filled VRMMO called Gun Gale Online (GGO). "Players who are shot by a mysterious avatar with a jet black gun lose their lives even in the real world..." Failing to turn down Kikuoka's bizarre request, Kirito logs in to GGO even though he is not completely convinced that the virtual world could physically affect the real world. 
 
Kirito wanders in an unfamiliar world in order to gain any clues about the "Death Gun." Then, a female sniper named Sinon who owns a gigantic "Hecate II" rifle extends Kirito a helping hand. With Sinon's help, Kirito decides to enter the "Bullet of Bullets," a large tournament to choose the most powerful gunner within the realm of GGO, in hopes to become the target of the "Death Gun" and make direct contact with the mysterious avatar. 
 
(Source: Crunchyroll)

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