Sinéad O'Connor
(pop/rock)
- The Lion and the Cobra
1987 - Ensign Records (CDP32 1612-2)
First album, standard european issue.
Oathbreaker
(post-black metal/post-hardcore)
- Eros|Anteros
2013 - Deathwish (DW147)
Second album, 6-panel digisleeve with lyrics made of thick cardboard.
- Rheia
2016 - Deathwish (DW196)
Third album, 6-panel digisleeve.
Obscura Amentia
(black metal)
- Ritual
2012 - no label (n/a)
Second album.
October Project
(folk-rock)
- Falling Farther In
1995 - Epic (EK 67019)
Second album, standard US issue.
- October Project
1993 - Epic (EK 53947)
First album, standard US issue.
Oizys
(black metal)
- Hymns to the Furies
2010 - Dark Adversary Productions (DA015)
First and only album.
Opera IX
(melodic black metal)
- Back to Sepulcro
2015 - Dusktone (DUSK022CD)
Compilation of re-recordings of old songs.
- Sacro Culto
2009 - Peaceville Records (CDVILED230)
Second album, reissue (remastered).
- The Black Opera: Symphoniae Mysteriorum in Laudem Tenebrarum
2000 - Dwell Records (CD-1060)
Third album, US issue.
- The Call of the Wood
2009 - Peaceville Records (CDVILED223)
First album, reissue (remastered edition with bonus tracks).
Oppressive Light
(depressive black metal)
- Entre les mains de la tristesse
2011 - Self Mutilation Services (SMSD012)
First EP, limited to 200 copies.
Oral
(heavy metal)
- Oral Sex
no label (n/a)
Unofficial CD reissue of their one and only EP.
Joan Osborne
(folk-rock)
- One of Us
Electric (EL 40085)
Live bootleg.
Kelly Osbourne
(pop rock)
- Shut Up
2002 - Epic (509478 2)
First album, european issue.
OtherStarPeople
(alternative rock)
- Diamonds in the Belly of the Dog
1999 - A&M Records (06949 0384 2)
First and only album.
Oubliette
(melodic black metal)
- Apparitions
2014 - The Artisan Era (n/a)
First album, carboard sleeve.
Over the Edge
(grunge/punk)
- Demo 2008
2008 - no label (n/a)
Self-released demo.
