Since the release of Guitar Hero World Tour on October 26, over twelve track packs have been made available as downloadable content, or DLC. The most recent "Pop Rock Track Pack" was available via Xbox Live and PlayStation Network as of May 14, 2009 for $5.49.Joystiq: Guitar Hero: World Tour "Pop Rock Track Pack" DLC available (May 14, 2009)

1. Metallica "Death Magnetic" full album
2. Classic Rock - October 23, 2008
3. Neversoft - October 30, 2008
4. Guitar Duel - October 30, 2008
5. R.E.M. - October 30, 2008
6. Oasis - November 6, 2008
7. Hendrix - November 13, 2008
8. Raconteurs - November 20, 2008
9. The Killers - November 25, 2008
10. The Smashing Pumpkins - December 4, 2008
11. Nirvana - December 11, 2008
12. European 01 - December 11, 2008
13. The Eagles - December 18, 2008Xbox.com: Guitar Hero World Tour Game Add-ons

Guitar Hero World Tour is the fourth title in the main franchise. The first Guitar Hero was released in 2005 and, since then, a total of 12 titles have been released for multiple platforms, with additional games currently in development. Previous GH games used a guitar controller and allowed two people to play cooperatively. Guitar Hero World Tour introduced a six-piece drum set and a microphone. Up to four players can now form a band and play simultaneously. Additionally, GH:WT is the first title in the series to offer almost an entire setlist of master recordings.Official Site: [www.guitarhero.com/ Guitar Hero] PR Newswire: Activision Unveils Full Guitar Hero(R) World Tour Set List (September 12, 2008)