List of bands (25):

Red Method
Retromorphosis
Revocation
Rhapsody of Fire
Ripped To Shreds
Rivers Of Nihil
Rob Zombie
Ronnie Romero
Rossometile
Sabaton
Saint Asonia
Sammy Hagar And The Circle
Sanctuary
Satriani / Vai
Savage Blood
Saxon
Scar Symmetry
Scardust
Schizma
Scott Stapp