Obscurus Advocam

Black Metal

2 Albums

Obsidyen

Black Metal

2 Albums

Occult

Death Metal

2 Albums

Odonata

Stoner Metal

2 Albums

Odyssey

Progressive Metal

1 Album

Oes Galliath

Black Metal

1 Album

Offending

Brutal Death Metal

2 Albums

Ohio Slamboys

Brutal Death Metal

2 Albums

Om Mani

Metal

2 Albums

Onirism

Symphonic Black Metal

5 Albums

ONLAP

Alternative Metal

9 Albums

Only Embers Remain

Metalcore

1 Album

öOoOoOoOoOo

Avant-Garde Metal

1 Album

Opal Insight

Doom Metal

1 Album

Oppressive Light

Depressive Black Metal

2 Albums

Orakle

Black Metal

4 Albums

Orbis

Doom Metal

1 Album

Ordalie

Black Metal

2 Albums

Order of the Death's Head

Black Metal

9 Albums

Ordo Blasphemus

Black Metal

2 Albums

Ordo Templi Aeternae Lucis

Black Metal

3 Albums

Orotoro

Progressive Metal

6 Albums

Osculum Infame

Black Metal

4 Albums

Osias Von Doom

Doom Metal

7 Albums