Activision has announced that master recordings from Grammy Award winning artists Velvet Revolver and the Foo Fighters will be the first downloadable track packs for the Xbox 360 and PS3 versions of Guitar Hero III: Legends of Rock. The Velvet Revolver Track Pack includes master recordings of "Messages", "She Builds Quick Machines" and the 2004 Grammy Award winner for Best Hard Rock Performance, "Slither". The Foo Fighters Track Pack includes master recordings of "The Pretender", "This Is a Call" and the 2002 Grammy Award winner for Best Rock Song, "All My Life". Additionally, later in November, the Boss Battle anthems will be available, free of charge. Originally composed music by Slash and Tom Morello along with "The Devil Went Down to Georgia" can be downloaded to play outside of Career mode.