hack//SIGN (TV Series 2002–2003) - IMDb

.hack//SIGN: Com Megumi Toyoguchi, Kazuhiro Nakata, Kaori Nazuka, Amanda Winn Lee. A strange boy named Tsukasa appears in the online video game "The World". He claims to be alive, and without a computer.

hack//Sign (2002 - 2003)

hack//SIGN (TV) - Anime News Network

hack//Legend of the Twilight (TV Series 2003) - IMDb

Hack (TV Series 2002–2004) - Episode list - IMDb

Watch: Top 10 Anime About Hacking for Cybersecurity Buffs

hack//Roots - Anime - AniDB

hack//SIGN (TV Series 2002–2003) - Episode list - IMDb

Prototypes of .hack, .hack//Wiki

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