.hack//Sign

Aura is in the background. From left to right:Sora, Bear, Subaru, Tsukasa, Mimiru, Crim, B.T.

Airing back in 2002, .hack//SIGN is a 26-episode Anime centering around a teenaged boy named Tsukasa who wakes up Inside a Computer System, an MMORPG called The World, with little memory of Real Life. Around the same time, a number of strange anomalies begin to occur in the game, causing a number of other characters to investigate the events surrounding Tsukasa and his strange connection to the game.

The show is notable for taking place inside an MMO yet featuring very little action. Most episodes consist of tense conversations between the various characters about the state of things, and the show is largely dialog-driven. It does not suffer from this. Also note that the entire thing is just a setup for the .hack games, so large chunks of the plot aren't resolved in this series.

See .hack for information about the franchise as a whole.

There are character sheets.

Tropes used in .hack//Sign include:

A Friend in Need: Bear, Mimiru, Silver Knight, and Subaru are apt to act like this throughout the series. By the end of the series, Tsukasa, Macha, BT, Crim, and maybe even Sora are thinking this way. Helba "couldn't guarantee what would happen" when the players returned to Net Slum - their real selves could have been in danger.
Abusive Parents: Tsukasa's father shown in flashbacks is shown to be quite a Jerkass. Despising Tsukasa for being a girl Slapping Tsukasa after being caught shoplifting, yelling and screaming while raving drunk and yanking a little kitten away that she was caring for. Added all to the fact he talks with the doctor about pulling comatose daughter off life support. And later tried to physically pull Tsukasa's body off life support himself; and had to be pulled away by doctors and presumably police.
A.I. Is a Crapshoot: Morganna certainly turned out... badly.
All There in the Manual: So what are their real names, anyway? Wait, what's that Skeith thing? Whatever happened to Sora? Oh no, did Tsukasa ever actually log out? Also, if you watch/read/play other parts of the .hack franchise without understanding the content in SIGN, you'll be equally confused...
Between My Legs: Mimiru's introduction.
Cherubic Choir: During Aura's awakening.
City of Canals: Mac Anu
Clothing Damage: The main cast's clothing disintegrates in the opening animation, Subaru's dress is destroyed when she's assaulted by another PK, and when the world punishes Tsukasa, his clothing is completely ripped apart.
Contemplate Our Navels
Creepy Monotone: Morganna
Cyberspace: The setting, almost entirely, is an MMORPG.
Dark Reprise: There are two versions of the song, Aura. One showing the majesty of the world, and the other showing the horror.
Deliberately Monochrome: All shots of Real Life are in static-filled greyscale, with Hidden Eyes. Except for the final real life shot which doubles as the final scene in the show. It shows Tsukasa's Player leaving the hospital after waking up (and thus finally being logged out due to the server crashing) and running into Subaru's Player as she leaves and manages to recognize without ever meeting in real life before. There's no spoken dialogue, but we do see the words they say on the screen. "Welcome back." "I'm home."
Despair Gambit: A key part of Morganna's plan.
Does This Remind You of Anything?: The scene where Morganna tortures Tsukasa is incredibly, disturbingly evocative of rape; Tsukasa is pinned to a bed, apologizing profusely. After that, all of his clothes are ripped off from the overwhelming power of the torture, and he is deposited back on the bed, naked, with a completely despairing, empty look on his face. All the while, he begs Morganna to 'stop this, please'. The camera angles during the first part just make the comparison all the more chillingly real.
Empathic Environment: The place where Aura sleeps and Tsukasa retreats. Sometimes it legitimately reflects Tsukasa's mood, but sometimes it's manipulated by Morganna to look more or less inviting.
The End - or Is It?: The series ends with a pretty clear indication that Morganna is still alive and well in The World. Justified, since the story really isn't over, and the anime was intended to be followed by the video games.
Eureka Moment
Eyes Always Shut: A-20. It shows that even though all the characters are drawn the same way, hers is much more cartoony-looking than most others.
Facial Markings: Used to distinguish Player Characters from NPCs.
Genre Savvy: Justified since they're people playing an MMORPG.
Gotterdammerung: In the backstory of The World, a war between the humans and the gods ended with the death of the gods and massive destruction.
Guardian Entity: Tsukasa has a cruel and trigger happy guardian.
Hair Colors: For the same reason as the Facial Markings.
Hermetic Magic
Heroic BSOD: Tsukasa after being data drained by Morgana.
Hidden Eyes: Nearly everyone's depiction in the real world has overshadowed eyes. Only the few honest or "free" personalities have eyes.
Inaction Sequence: There are substantial stretches of dialog in this series which can come across as filler. But because of the nature of the story, players are just trying to explain what is happening outside the scope of the game.
Instant AI, Just Add Water: Or research on emotions, in this case.
Instant Runes
The Ken Burns Effect: The series is full of it
Meadow Run: Tsukasa and Subaru do this only it's in the city and it freezes and dissolves before they do reach each other.
Only Six Faces: Not really with the main characters, but because this is a video game, many extras and background characters show up now and then with the same character customizations as the protagonists. Apparently Subaru is so popular that other players create characters in the game to look just like her.
Painting the Fourth Wall: Happens a few times, most notably when Mimiru freeze in mid-gesture because her player walked way to get a snack, or when Bear stops in his tracks to say that he needs more paper to map the dungeon.
Role Playing Game Verse: Literally.
Schrödinger's Butterfly: The series ends with Helba forcibly deleting Net Slum in a desperate effort to stop Skeith, causing everyone to be ejected from the game as the server crashes. This results in Tsukasa finally waking from her coma and having a heartwarming meeting with Subaru in the real world...but when their hands touch, a distinctly cyberspace-y hexagon grid appears, and it then cuts to a scene of what appears to be the ruins of Net Slum, with a mysterious monologue from Morganna. It doesn't help either that the "real world" segment of Tsukasa leaving the hospital and meeting Subaru has a somewhat surreal tone to it, what with the whole silent movie style and all. Ultimately, it's not really clear until later installments in the .hack series (or the second SIGN OVA) whether or not Tsukasa actually ever managed to log out.
Schoolgirl Lesbians: Tsukasa and Subaru
MMORPGs are Serious Business: The basic point of the franchise but .hack//SIGN is infamous for taking it to ridiculous extremes.
The Power of Friendship
"The Reason You Suck" Speech: The "shadow" versions of Tsukasa, Mimiru, and Subaru do this (it's really Morganna) in the last episode.
There Are No Girls on the Internet: Averted.
Too Clever by Half: Sora. One of the World's most powerful characters and skilled players, with maxed-out level and attributes, and he's fully aware of how good he is while being insufferably immature about it all. Then in the last episode of SIGN we learn he's Just a Kid - a fourth-grader, to be more exact.
Trapped in Another World: Tsukasa again.
Twenty Minutes Into the Future
Widget Series: There are enough qualities of The World to make it qualify, such as an Honest Axe quest featuring a water fairy with a deranged accent instead of Mercury, and an emo Grunty that runs away to be an Eeyore somewhere if you force it to grow up.
Woman in White: Aura, Helba.
"World of Cardboard" Speech: Tsukasa at the end of the series.
Why Couldn't You Be Different?: Tsukasa's father doesn't like her for being a girl.
You Are Not Alone: Tsukasa's friends, especially Subaru, send this message strongly.
You Gotta Have Blue Hair: There are player characters like Sora running around with green hair. It's revealed that Subaru's player has blue hair in real life.
Your Mind Makes It Real: Characters who get attacked by Data Drain also reportedly suffer severe comas in the real world.