Guitar Hero III: Legends of Rock is the third full installment in the Guitar Hero series (the fourth title overall). The game is published by Activision and RedOctane, with Neversoft as the developer for the PlayStation 2, PlayStation 3, Xbox 360, and Wii consoles, and Aspyr Media as the developer for the PC and Macintosh computers. Due to the acquisition of RedOctane by Activision, Harmonix Music Systems is no longer involved in developing titles in the Guitar Hero series; instead, they developed the competing Rock Band.