Claim: The Gameplay in Rock Band is similar to that of Guitar Hero (a series of music rhythm game video games first released in 2005) and incorporates elements from Harmonix' Karaoke Revolution.
Evidence: The Rock Band games are score-based music video games that combine elements of two of Harmonix' previous efforts: Guitar Hero and Karaoke Revolution, allowing up to four players to play on lead and bass guitar, drums, and vocals. Guitar Hero is a series of music rhythm game video games first released in 2005, in which players use a guitar-shaped game controller to simulate playing lead, bass guitar, and rhythm guitar across numerous rock songs.