Most of the songs featured in the main set list are cover versions, with the exception of "Stop!", "Possum Kingdom", "Dead!", and "John the Fisherman"; these four are based on master recordings. The unlockable bonus songs are all master recordings, including some specifically arranged for use within "Guitar Hero II". Cover songs are credited on screen with the phrase "as made famous by" (for example, ""Heart-Shaped Box, as made famous by Nirvana""), while the original songs are credited with "as performed by" (for example, ""John the Fisherman, as performed by Primus"").