Both packs are now available on Xbox Live Marketplace and will be released on PlayStation Store later this month.
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, 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.
"The Guitar Hero franchise was a pioneer into the music download space for next generation gaming," said Dusty Welch, Head of Publishing for Activision/RedOctane. "We’re excited to provide Guitar Hero fans an opportunity to download and play their favorite hits from legendary artists."