name primarily features songs from the 1980s. The game was criticized for its small selection of songs, and in one case compared unfavorably to Lou Reed's album Metal Machine Music for allegedly being a mere contractual obligation project. Guitar Hero: Aerosmith was the first Guitar Hero game to center on one specific artist. On September 4, 2007, Billboard announced that Aerosmith was "working closely with the makers of Guitar Hero IV", which would be "dedicated to the group's music". On February 15, 2008, Activision announced that Guitar Hero: Aerosmith would be released on June 29, 2008. Guitar Hero: Aerosmith was developed by Neversoft for the Xbox 360 and PlayStation 3 versions, by Vicarious Visions for the Wii, and by Budcat Creations for the PlayStation 2. The game's setlist is mostly Aerosmith songs, with other songs from Joe Perrys solo work or artists that have inspired or performed with Aerosmith, including Run-DMC. Guitar Hero: Metallica, the next entry in the series to center on one artist, was released on March 29, 2009. It is based on the full band experience of World Tour, and educates players on Metallica's history and music in the same manner as Guitar Hero: Aerosmith did for Aerosmith. The game also debuted a new difficulty for drums, called Expert+ (read "expert-plus"), intended to incorporate a second bass drum pedal for songs that would otherwise be too difficult to play on drums. Guitar Hero Smash Hits (titled Guitar Hero: Greatest Hits in Europe and Australia) was released in June 2009. It features full-band versions of 48 songs from earlier Guitar Hero games that only used the guitar controller. Unlike the previous versions, each of the songs is based on a master recording that includes some live tracks. The game follows a similar model as Guitar Hero: Metallica, and was developed by Neversoft and Beenox Studios for the PlayStation 3, Xbox 360, PlayStation 2, and Wii. Guitar Hero: Van Halen was released on December 22, 2009, though customers that purchased Guitar Hero 5 under a special promotion received a copy of the game early. Like the other games oriented around a specific artist, Guitar Hero: Van Halen mainly uses songs by the band Van Halen, including three guitar solos by Eddie Van Halen, in addition to guest acts such as Queen, Weezer, Blink-182, Foo Fighters, The Offspring, and Queens of the Stone Age. Band Hero was announced in May