Omega Massif

Post-Metal

5 Albums

Omegavortex

Death Metal

3 Albums

Omnicidal Instinct

Brutal Death Metal

1 Album

On Atlas’ Shoulders

Heavy Metal

4 Albums

One Last Hero

Metalcore

1 Album

Op de swarte Thraun

Black Metal

1 Album

Ophis

Doom Metal

6 Albums

Orae

Death Metal

2 Albums

Orden Ogan

Power Metal

11 Albums

Orkus

Black Metal

3 Albums

Orlog

Black Metal

3 Albums

Orphalis

Death Metal

4 Albums

Ost+Front

Industrial Metal

7 Albums

Osyris

Power Metal

1 Album

Othuum

Doom Metal

1 Album

Outlaw

Black Metal

5 Albums

Outlyer

Metal

1 Album

Out Of Mind

Melodic Death Metal

2 Albums

Oversense

Power Metal

3 Albums

Owl

Death-Doom Metal

11 Albums

Paid in Pain

Metal

2 Albums

Palace

Heavy Metal

8 Albums

Pale Summit

Sludge Metal

2 Albums

Pandemic

Heavy Metal

1 Album