The year is 2022. Mankind has finally perfected virtual reality. And within the VRMMORPG (Virtual Reality Massively Multiplayer Online Role Playing Game) Sword Art Online, there was a player called Kirito. While he was enjoying the world of SAO, he and the other 10,000 logged-in players all received a frightening message from the Game Master—that the only way to escape from that world was to clear the game, and that a game over within the game would mean their death in the real world.
That was the frightening true story behind this game.
Kirito was one of the first players to accept this “truth”, and began his solo play, refusing to form a party, as he threw himself into the never ending battles that lay before him…
(Source: MU)

Follows the heroines from the Aincrad arc through their various adventures in the real world at the SAO Survivor School and in the virtual world of ALfheim Online.

While on their way to Zakkaria from Rulid Village, Eugeo and Kirito encounter a noble girl named Medina battling monsters on the highway. Medina Orthinanos is a noble whose family was banished to the borderlands due to being considered defects by the empress of Norlangarth. Having lost her father in an accident, Medina seeks to become an Integrity Knight to clear her family's besmirched name. Little did she know that the two boys she encountered on the road to Zakkaria shared her goal of becoming Integrity Knights but would one day go up against the Axiom Church and kill the supreme ruler of the church...

In 2026, four years after the infamous Sword Art Online incident, a revolutionary new form of technology has emerged: the Augma, a device that utilizes an Augmented Reality system. Unlike the Virtual Reality of the NerveGear and the Amusphere, it is perfectly safe and allows players to use it while they are conscious, creating an instant hit on the market. The most popular application for the Augma is the game Ordinal Scale, which immerses players in a fantasy role-playing game with player rankings and rewards.

Following the new craze, Kirito's friends dive into the game, and despite his reservations about the system, Kirito eventually joins them. While at first it appears to be just fun and games, they soon find out that the game is not all that it seems...

A series of 4-panel comic strips that touch on the days of Aincrad in a comedic viewpoint.

In the year 2022, gamers rejoice as Sword Art Online-a VRMMORPG (Virtual Reality Massively Multiplayer Online Role Playing Game) like no other-opens its virtual doors, allowing players to take full advantage of the ultimate in gaming technology: NerveGear, a system that allows users to completely immerse themselves in the game world by manipulating their brain waves to create 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)

August 2019, scientists received extraterrestrial signals warning them of the catastrophes that will hit Earth.
Following it, various extraterrestrial life forms come into contact with the human species. People who are affected by these energies, called the Third Eye, develop mysterious powers. Some are able to move at the speed of sound, others possess a sword that is capable of even cutting steel, or those who are able to tear absolutely everything apart with their teeth.
We follow the daily life of Utsugi Minoru, a discreet 17-year-old teenager who obtained the ability he has always desired, the Solitude (code name lsolator), and Yumiko, a member of an organization that monitors these new superhumans. The prowess given by Absolute Solitude results in endless battles for Minoru.

"This game is impossible to clear. It's just a matter of when, where and how you die." Kayaba Akihiko's death game has been up for one month. This incredibly difficult VRMMO has already claimed 2000 victims. It's the day of the 1st floor boss strategy meeting. The solo player Kirito, who's decided to only strengthen himself, meets a rare female player on the current front lines, while heading to the meeting around noon. Fighting alone against the strong monsters, she was like a meteor cutting the night sky.
A compilation of Aria in the Starless Night, where Kirito becomes known as the Black Swordsman, the events concerning the 2nd floor boss clearing, and Rondo of the Transient Blade, the sad tale of a young male blacksmith.
(Source: Novel volume 1 description)

Kirito awakens in a vast, fantastical forest filled with towering trees. In his search for clues to the truth of his surroundings, he encounters a young boy who seems to know him. He ought to be a simple NPC, but the depth of his emotions seem no different than a human. As they search for the boy's parents, Kirito finds a peculiar memory returning to him. A memory from his own childhood, of this boy and a girl, too, with golden hair, and a name he should have never forgotten—Alice.

(Source: Yen Press)

When Kirito took on a random quest on the 76th floor to kill time, he didn't expect to be transported to a bedroom and find himself wearing pyjamas. To his surprise, the One Thousand and One Nights quest summons various girls that he is acquainted with, all of whom are tricked into thinking that they have to share a bed with Kirito to complete the quest. The true goal of the quest, however, is for Kirito to survive till morning without getting into bed with them. If he fails, there will be a penalty for the girls...

Chiaki recently returned from America, enrolling into an all-girls school. Her brother used to tell her stories about a "Snow Black Princess" and her adventures in a magical kingdom before he died. Seeing an opportunity, two of her seniors try to install Brain Burst on her, only to be rejected. Turns out her brother already installed it three years ago on his deathbed, and is an unknowing Avatar.
(Source: TV Tropes)