Which game was the first Guitar Hero title with all master recordings on disc?

Guitar Hero World Tour was the first Guitar Hero title with all of its on-disc master recordings.

Released in 2008, World Tour placed 86 songs on the game disc, and all 86 were master recordings rather than newly performed cover versions. Earlier Guitar Hero games mixed original artist recordings with covers, often recreating songs when licensing the original master was not practical. World Tour’s soundtrack therefore marked a major change in how the series presented its music.

The game was also a substantial expansion of the format. It added drum and microphone parts to the established guitar and bass gameplay, allowing up to four players to form a virtual band. Its soundtrack included artists such as Van Halen, Jimi Hendrix, Tool and Nirvana.

A common mix-up is confusing “all master recordings” with “all downloadable music.” The claim applies to the 86 songs included on the World Tour disc; downloadable content and user-created songs were separate systems. World Tour also introduced downloadable-song support on the Wii.