 The games have also added multiplayer modes . Cooperative modes allow two players to play lead and either bass or rhythm guitar on the same song , working together towards the same score . A competitive Face @-@ Off mode allows two players to play against each other at different difficulty levels , each attempting to earn the best score on a song . Each player plays different portions of the song . There is also a Pro Face @-@ Off mode , where two players battle at the same difficulty level . Unlike standard Face @-@ off , each player attempts to play all of the notes in a song , while still trying to earn the highest score . In Guitar Hero World Tour this was advanced on , as players could play a Pro Face @-@ Off game against each other on any difficulty level , the lower your difficulty , the more points were awarded so a player on a low difficulty could potentially beat a player on a more challenging difficulty . 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 <unk> on lead and bass guitar , drums , and vocals , while a total of eight players can compete in a Battle of the <unk> . The Xbox 360 , PlayStation 3 , and Wii versions of the games support multiplayer modes over their respective network services . 
