Oaks: Bravo!
Obituary: Darkest Days
Octane Gypsy: Tough Luck Mile
Jon Oliva's Pain: Maniacal Renderings
Omainen: Routes To Nowhere
On The Rise: Dream Zone
Opeth: Watershed
Orden Ogan: Easton Hope
Orpheus: Orpheus
OSI: Blood
OTR: Mamonama
Outbreak: Outbreak
Outloud: Outloud
Outworld: Self-Titled
Overdrive: Let The Metal Do The Talking
Overland: Diamond Dealer (2009)
Overland: Break Away (2008)
Owens, Tim 'Ripper' : Play My Game
Ozzy Osbourne: Black Rain