sentences:  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.