- O -

OBITUARY
USA
Back From The Dead ('97)        

THE OFFSPRING
USA
Smash ('94) Ixnay On The Hombre ('97) Americana ('98) Conspiracy Of One ('00)

OMNIUM GATHERUM
FIN
The Snake And The Way('07) Red Shift ('08) Origin ('21)    

陰陽座
JPN
煌神羅刹('02) 封印廻濫 ('02) 鳳翼麟瞳 ('03) 夢幻泡影 ('04) 臥龍點睛 ('05)
陰陽珠玉 ('06) 魔王戴天 ('07) 魑魅魍魎('08) 金剛九尾('09) 鬼子母神('11)

OPETH
SWE
Orchid ('95) Still Life ('99) Deliverance ('02) Damnation ('03) Ghost Reveries('05)
The Roundhouse Tapes ('07) Watershed ('08) Heritage ('11) Pale Communion('14) In Cauda Venenum ('19)

ORPHANED LAND
ISR
The Beloved's Cry('93) Mabool - The Story Of The Three Sons Of Seven ('04) The Never Ending Way Of ORwarriOR('10) All Is One('13)  

OVERKILL
USA
From The Underground And Below ('97)      

OZZY OSBOURNE
GBR
Blizzard Of Ozz ('81) Diary Of A Madman ('81) The Ultimate Sin ('86) No Rest For The Wicked ('88) No More Tears ('91)
Ozzmosis ('95) The Ozzman Commeth ('97) Down To Earth ('01) Scream ('10)