.hack//SIGN is a tV series anime that premiered in spring 2002, produced by Bee Train.

About the production: the story comes from an original script, there are 26 episodes of about 24 minutes and its current status is "finished".

Its main genres are adventure, fantasy, mystery and sci-fi, with themes such as Virtual World, Video Games, Anti-Hero and Amnesia.

On AniList, .hack//SIGN has an average score of 66%, a good score, and appears on 36,363 users' lists.

The franchise continues in or follows from: .hack//Roots, .hack//INTERMEZZO and .hack//Unison.

A young wavemaster, only known by the alias of Tsukasa, wakes up in an MMORPG called The World, with slight amnesia. He does not know what he has previously done before he woke up. In The World, he is suspected to be a hacker of the Crimson Knights, as he was seen accompanying a tweaked character in the form of a cat. Unable to log out from the game, he wanders around looking for answers, avoiding the knights and other players he meets along the way. As Tsukasa explores The World, he stumbles upon a magical item that takes the form of a 'guardian', which promises him protection from all harm. Subaru, the leader of the Crimson Knights, along with several other players who became acquainted with Tsukasa, set out to investigate why Tsukasa is unable to log out, and attempt to get to the bottom of the problem before it gets out of hand. [Written by MAL Rewrite]

Official synopsis from AniList.