.hack//G.U. is a series of single-player action role-playing games for the PlayStation 2, developed by CyberConnect2 and published by Bandai Namco Games. The series contains three games: .hack//G.U. Vol. 1: Rebirth , .hack//G.U. Vol. 2: Reminisce and .hack//G.U. Vol. 3: Redemption. As in the previous .hack games, .hack//G.U. simulates a massively multiplayer online role-playing game as the player controls a character who starts playing it. The story focuses on a player named Haseo who hunts a player nicknamed Tri-Edge who defeated his friend Shino and left her in a coma in real life. Haseo comes into contact with other players who know of Tri-Edge and wish to stop him. The reason for Shino and several other players falling into a coma is connected with AIDA, a mysterious computer anomaly that infects the characters.