sentences:  It is the last game in the series developed by Neversoft's "Guitar Hero" division prior to its dissolution, with Vicarious Visions assisting on the Wii version with added Nintendo DS functionality.The game has been described as returning to the roots of the "Guitar Hero" series; while it still allows for full band play, the soundtrack's focus is on rock and roll music and an emphasis on guitar "shredding".The game introduced a career-based "Quest Mode", narrated by Gene Simmons, that guides the players to complete songs to unlock "warriors of rock" to join them in saving "demigod of rock" and his guitar from his imprisonment by "the Beast".