More than just an outstanding and comprehensive 48-song setlist, Guitar Hero: Smash Hits is chock full of crowd-pleasing game features. It allows up to four players to join together and rock locally, or battle other bands online with up to 8 players. It features Rock Star Creator, first made famous in Guitar Hero World Tour, as well as Music Studio and GHTunes which together allow players to create their own hits and share them online. The game also adds another dimension of difficulty with the drum kit controller's double kick-pedal "Expert+ difficulty level first seen in Guitar Hero: Metallica.