In appreciation of Guitar Hero and Halo fans alike, Neversoft, Bungie, Activision/RedOctane, and Microsoft have all joined forces to bring players the iconic Halo theme (MJOLNIR Mix) as a free playable song for Guitar Hero III: Legends of Rock, exclusively for the Xbox 360 video game and entertainment system from Microsoft. The theme will be available from Xbox LIVE Marketplace on Friday, November 23nd.

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.

Source: Activision