sentences:  "Guitar Hero III" introduced Boss Battles, in which two players face off against each other, attempt to collect "distractions" to throw at their opponent, trying to make them fail.With "Guitar Hero World Tour", up to four players can play cooperatively on lead and bass guitar, drums, and vocals, while a total of eight players can compete in a Battle of the Bands.The Xbox 360, PlayStation 3, and Wii versions of the games support multiplayer modes over their respective network services.