1. Guitar Hero rips off Guitar Freaks
2. Rock Band rips off Guitar Freaks and Drummania (that’s one game), as well as Guitar Hero (their own game, which has ripped off Guitar Freaks, which is half of Guitar Freaks and Drummania) and Karaoke Revolution (again, their own game)
3. Guitar Hero (now developed by a different company) rips off Rock Band, which has ripped off Guitar Freaks and Drummania, Guitar Hero (which is a ripoff of Guitar Freaks), and Karaoke Revolution

The American music game industry is truly a creative one.