- Country: Japan
- Genres: Action, Adventure, Animation
- Release: 2003-02-10
- Director: Hiroshi Matsuyama , Hiroto Niizato
- Writers: Kazunori Itô (story) , Kirin Mori (script) , Kirin Mori (story) , Mitsuhiko Sawamura (story)
- Language: English | Japanese | German
- Stars: Mona Marshall , Mona Marshall , Sayaka Aida , Wendee Lee , Wendee Lee , Masumi Asano , Kirk Thornton , Kirk Thornton , Yasunori Masutani , Yasunori Masutani , Yasunori Masutani , Doug Erholtz , Doug Erholtz , Nobuyuki Hiyama , Nobuyuki Hiyama , Nobuyuki Hiyama , Mary Elizabeth McGlynn , Mary Elizabeth McGlynn , Mary Elizabeth McGlynn , Mary Elizabeth McGlynn
- Runtime: min
- Awards: N/A
- AKA: .hack//Infection Part 1 (United Kingdom) , .hack//Spread of Infection (Japan) , .hack//感染拡大 (Japan) , .hack//Osen kakudai vol. 1 , Dot hack//Infection: Part 1 (United States of America) , .hack//Infection Part 1 (Australia) , .hack//Infection Part 1 (Germany) , .hack//Infection (United States of America) , .hack//Infection Part 1 (United States of America) , .Hack//Infection (Japan)
- Plot: A fourteen year old boy named Kite is invited by his schoolmate, Orca, to play the online game The World. While playing the game both Kite and his friend are attacked by an unknown monster. As a result, Orca becomes comatose in the real world. Despite his friend's condition, Kite continues to play The World believing he'll find a way to revive Orca. While playing, Kite accepts Book of Twilight from a mysterious girl in white. Kite is transformed into an outlaw player within the game wielding the very same power responsible for Orca's condition.
- IMDB:tt0363395
.hack//Infection Cast
Mona Marshall
Kite
Mona Marshall
Kite
Sayaka Aida
Kite
Wendee Lee
BlackRose
Wendee Lee
BlackRose
Masumi Asano
BlackRose
Kirk Thornton
Orca
Kirk Thornton
Orca
Yasunori Masutani
Orca
Yasunori Masutani
Sanjuro
Yasunori Masutani
Moonstone
Doug Erholtz
Balmung
Doug Erholtz
Balmung
Nobuyuki Hiyama
Balmung
Nobuyuki Hiyama
Nuke Usagimaru
Nobuyuki Hiyama
Marlo
Mary Elizabeth McGlynn
Helba
Mary Elizabeth McGlynn
Helba
Mary Elizabeth McGlynn
Emma Wielant
Mary Elizabeth McGlynn
Emma Wielant