(Music Downloads Not Rated by the ESRB) Build your Rock Band library by purchasing this song game track pack: The PAX Collection 01. This pack includes "Skullcrusher Mountain" by Jonathan Coulton, "Shhh...." by The Darkest of the Hillside Thickets, and "Livin' at the Corner of Dude and Catastrophe" by MC Frontalot. PLEASE NOTE: Rock Band game disc is required to play song game tracks. This song game track pack includes three song game tracks at a discounted rate over individual purchases. Many Rock Band songs are available as both a multipack and as a single game track. These songs are exactly the same. Be aware that it is possible to download the same song twice so please carefully consider your purchases. For song credits, visit RockBand.com.