The theme will be available from Xbox LIVE Marketplace on Thanksgiving, Thursday, November 22nd.

The Halo theme was written, composed, and performed by Martin O’Donnell and Michael Salvatori; and the MJOLNIR Mix features guitars performed by the Grammy Award winning guitar hero, Steve Vai.

“It’s a real pleasure to hear one of the best loved and most iconic themes from Bungie’s Halo Universe in Guitar Hero III: Legends of Rock,” said Marty O’Donnell, Composer and Audio Director for Bungie Studios. “As longtime fans of the Guitar Hero franchise, it was great to collaborate with Neversoft and Activision/RedOctane to offer this exciting free download to our fans.”