.hack debuted as a video game with 2002’s .hack//Infection, and are part of a multimedia franchise that encompasses television anime, manga, and even music. The .hack games are developed by CyberConnect2, which is currently working on Asura’s Wrath for Capcom.
The movie is CG and 3D and, as you can see from the trailer, it’s more story within a story from .hack. It hits Japanese theatres January 2012.
.hack//TheMovie [Official Site]