The story follows Reiko Higashiyama as she navigates a virtual world called the NerveGear, which is connected to a powerful computer system. She soon discovers that her sister's avatar is trapped within this digital realm and must help rescue her. Along the way, Reiko uncovers secrets about her own past and the true nature of the NerveGear.
The gameplay involves exploring a series of interconnected worlds, battling monsters, and solving puzzles to progress through the story. Players can also engage in multiplayer battles with other characters, using real-time strategy to outmaneuver opponents.
.hack GU Rebirth Special Edition was released on October 1st, 2006 for the PlayStation 2, offering a unique blend of action-RPG and social simulation elements.