Wondering why there isn't any Led Zeppelin in the Rhythm Games you love? Here's what Michael McWhertor of Kotaku says,
"According to their management, the band isn't 'comfortable' giving up access to its master tapes, the very thing required to edit these things down to Rock Band and Guitar Hero ready formats.
'It ain't about the money,' says Peter Mensch of Q Prime Management who handles Led Zep's interests."
McWhertor goes on to list a few of the bands that have given up the access, including Van Halen, Steely Dan, Guns N' Roses, and the Eagles.