The original Guitar Hero was released on the PlayStation 2 in November 2005. Guitar Hero is notable because it comes packaged with a controller peripheral modeled after a black Gibson SG guitar. Rather than a typical gamepad, this guitar controller is the primary input for the game. Playing the game with the guitar controller simulates playing an actual guitar, except it uses five colored "fret buttons" and a "strum bar" instead of frets and strings. The development of Guitar Hero was inspired by Konami's GuitarFreaks arcade game, which at the time, had not seen much exposure in the North American market; RedOctane, already selling guitar-shaped controllers for imported copies of GuitarFreaks, approached Harmonix about creating a game to use an entirely new Guitar controller. The concept was to have the gameplay of Amplitude with the visuals of Karaoke Revolution, both of which had been developed by Harmonix. The game was met with critical acclaim and received numerous awards for its innovative guitar peripheral and its soundtrack, which comprised 47 playable rock songs (most of which were cover versions of popular songs from artists and bands from the 1960s through modern rock). Guitar Hero has sold nearly 1.5 million copies to date.
The popularity of the series increased dramatically with the release of Guitar Hero II for the PlayStation 2 in 2006. Featuring improved multiplayer gameplay, an improved note-recognizing system, and 64 songs, it became the fifth best-selling video game of 2006. The PlayStation 2 version of the game was offered both separately and in a bundle with a cherry red Gibson SG guitar controller. Guitar Hero II was later released for the Xbox 360 in April 2007 with an exclusive Gibson X-Plorer guitar controller and an additional 10 songs, among other features. About 3 million units of Guitar Hero II have sold on the PlayStation 2 and Xbox 360.
Guitar Hero III: Legends of Rock was released in late 2007 for the PlayStation 2, PlayStation 3, Xbox 360, Wii, Win, and Mac platforms. The title is the first installment of the series to include wireless guitars bundled with the game and also the first to release a special bundle with two guitars. The game includes Slash and Tom Morello as playable characters in addition to the existing fictional avatars; both guitarists performed motion capture to be used for their characters' animation in the game.
Guitar Hero World Tour, previously named Guitar Hero IV, is the fourth full game in the series and was released on October 26, 2008 for PlayStation 2, PlayStation 3, Xbox 360, and Wii. Analysts had expected that future Guitar Hero games in 2008 would include additional instrument peripherals to compete against Rock Band; Guitar Hero World Tour was confirmed as in development following the announcement of the merger between Activision and Vivendi Games in December 2007. Activision's CEO Bobby Kotick announced on April 21, 2008 that Guitar Hero World Tour will branch out into other instruments including vocals. Guitar Hero World Tour includes drums and vocals, and can be bought packaged with a new drum set controller, a microphone, and the standard guitar controller. A larger number of real-world musicians appear as playable characters, including Jimi Hendrix, Billy Corgan, Hayley Williams, Zakk Wylde, Ted Nugent, Travis Barker, Sting, and Ozzy Osbourne. Guitar Hero World Tour also features custom song creation that can be shared with others.
Guitar Hero 5, the fifth main entry in the series, was confirmed in December 2008. It was released on September 1, 2009, and includes 85 songs from 83 different artists. The game includes new game modes and features, including its 'Party Mode' which gives players the ability to drop-in and out and change difficulties in the middle of a song. Artists including Johnny Cash, Matt Bellamy, Carlos Santana, Kurt Cobain and Shirley Manson appear as playable characters in the game.
Guitar Hero: Warriors of Rock, the sixth main console game in the series, is expected to be released September 28, 2010. It is the last game in the series to be 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 will still allow for full band play, the soundtrack's focus is on rock and roll music and an emphasis on guitar "shredding". The game introduces 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".