Guitar Hero was created from a partnership between RedOctane, then their own company that produced specialized video game controllers, and Harmonix, a music video game development company who had previously produced Frequency, Amplitude, and Karaoke Revolution. RedOctane was seeking to bring in a Guitar Freaks-like game, highly popular in Japan at the time, into Western markets, and approached Harmonix about helping them to develop a music game involving a guitar controller. Both companies agreed to it, and went on to produce Guitar Hero in 2005.[2] The title was highly successful, leading to the development of its successful sequel, Guitar Hero II, in 2006.