ON ATLAS' SHOULDERS

Aion

Powermetal

OLD FOREST

Graveside

Black Metal 

THE OPTIMIST IN ME

You Should Smile More Often

Alternative Rock

OBNOXIOUS YOUTH

Burning Savage

Speed / Thrash Metal

OWLBEAR

Chaos to the Realm

Heavy Metal

ORCUMENTARY

ORCumentary

Folk / Death Metal

OMNIKOLOSS

Wandering Through Concrete 

Black Metal / Industrial

ONYRIA

X

Alternative Rock

ORYAD

Sacred & Profane

Progressive Metal Doom

OPUS ARISE

The Network

Symphonic / Instrumental

OÏKOUMEN

Dystopia

Progessive / Symphonic Metal

ORDALIE

Mass of Perdition

Black Metal

OF VIRTUE

Sinner

Metalcore

ONSLAUGHT KO...

Onslaught Kommand

Black Death Metal

ON 

ON 

Post Punk

OWL MAKER 

Paths Of The Slain

Metal

OBSCURA AMENTIA 

The Art Of The Human Decadence

Doom / Black Metal

OBSECRATION 

Oceanum Oblivione

Old School Death Metal

OF WOLVES 

Balance

Deathcore / Metalcore

OGMASUN 

Into the Void

Experimental / Post-Metal

OLYMP 

Olymp

Heavy Metal

OVERSTRANGE MOOD 

Which Way?

Progressive Metal

OVERT ENEMY 

Inception

Thrash Metal

OPRICH 

All Sails To The Wind

Folk Metal