GUITAR HEROS

The original Guitar Hero was released on the PlayStation 2 in November 2005 and was developed by Harmonix. Harmonix had been previously known for developing music video games such as Frequency and Amplitude for the PlayStation 2, both of which were praised for enabling players to perform and create music using a DualShock controller as if it were a musical instrument.[4]
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.[5][6][7][8] 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.[9]
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.[10] 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.[11]
The final game in the Guitar Hero series to be developed by Harmonix was Guitar Hero Encore: Rocks the 80s for the PlayStation 2, which was released in July 2007.[12] The expansion reskinned the visuals from Guitar Hero II, and featured a shorter track list with no bonus songs, and was not as well received as the previous two games. Some reviewers considered Rocks the 80s as Harmonix's contractual obligation, given that, as described below, Harmonix would no longer be working on the Guitar Hero series.[13]