Obastra

Deathcore - USA

Obeisance

Thrash Black - USA

Obelisk (USA-1)

Folk Metal - USA

Obelisk (USA-2)

Melodic Death - USA

Obelus Demonic

Industrial Death - USA

Oberon (USA)

Dark Ambient - USA

Obey Bizar

Thrash Metal - USA

Obire Pestis

Black Metal - USA

Obituary

Death Metal - USA

Object Of Aggression

Metalcore - USA

Oblation

Death Metal - USA

Oblidian

Metal - USA

Oblige

Death Metal - USA

Obliquity

Death Metal - USA

Obliterate The Apex

Technical Death - USA

Obliterated

Progressive Death - USA

Obliterated Rectum

Porno Gore Grind - USA

Obliteration (USA-1)

Black Death - USA

Obliteration (USA-2)

Deathcore - USA

Obliteration X

Death Metal - USA

Obliterator (USA)

Thrash Metal - USA

Obliteratus

Black Metal - USA

Obliviation

Deathcore - USA

Oblivion (USA-1)

Power Metal - USA

Oblivion (USA-2)

Thrash Metal - USA

Oblivion (USA-3)

Thrash Metal - USA

Oblivion (USA-4)

Technical Death - USA

Oblivion (USA-5)

Progressive Death - USA

Oblivion AD

Heavy Metal - USA

Oblivion Knight

Speed Metal - USA

Oblivion Myth

Progressive Power - USA

Oblivion Sacrifice

Heavy Metal - USA

Oblivion Winters

Melodic Doom - USA

Oblivious Enslavement

Melodic Black - USA

Oblivious Signal

Melodic Metal - USA

Oblong Box

Death Thrash - USA

Obolus

Atmospheric Black - USA

Obscene (USA)

Death Metal - USA

Obscene Gesture

Crossover - USA

Obscene Jester

Power Metal - USA

Obscenum

Death Metal - USA

Obscure Oracle

Thrash Metal - USA

Obscured Secretions

Brutal Death - USA

Obscureism

Black Metal - USA

Obscurity (USA)

Death Metal - USA

Obscurum (USA)

Black Metal - USA

Obsecrate The Deity

Technical Death - USA

Obsequiae

Atmospheric Black - USA

Obsequy

Progressive Death - USA

Observer (USA)

Deathcore - USA

Obsession (USA)

Heavy Metal - USA

Obsidian (USA-1)

Death Metal - USA

Obsidian (USA-2)

Thrash Heavy - USA

Obsidian (USA-3)

Symphonic Death Black - USA

Obsidian Blood

Black Metal - USA

Obsidian Flow

Technical Death - USA

Obsidian Grave

Black Metal - USA

Obsidian Hammer

Sludge Metal - USA

Obsidian Shrine

Black Metal - USA

Obsidian Silence

Hard Rock - USA

Obsidian Skies

Progressive Death - USA

Obsidian Sword

Sludge Doom - USA

Obsidian Tongue

Atmospheric Black - USA

Obsidian Towers

Dungeon Synth - USA

Obskurum

Black Metal - USA

Obsolete (USA)

Thrash Death - USA

Obsta

Death Black - USA

Obstination

Doom Metal - USA

Obstruktor

Death Thrash - USA

Obviate

Deathcore - USA

Occision

Brutal Death - USA

Occlith

Doom Black - USA

Occulsed

Death Metal - USA

Occult Revival

Black Metal - USA

Occult Wisdom

Stoner - USA

Occultation

Atmospheric Doom - USA

Occultist

Death Thrash - USA

Ocean (USA)

Sludge Doom - USA

Ocean Architecture

Progressive Metal - USA

Ocean Hills

Hard Rock - USA

Ocean Of Ghosts

Drone - USA

Ocean Of Illusions

Deathcore - USA

Ocean's Aftermath

Metalcore - USA

Oceana (USA)

Post Hardcore - USA

Oceanborn

Progressive Metal - USA

Oceano

Deathcore - USA

Oceans Of December

Metalcore - USA

Oceans Of Flesh

Death Thrash - USA

Oceans Of Night

Progressive Metal - USA

Oceans Of Slumber

Progressive Death - USA

Oceans Will Part

Metalcore - USA

Oceansnow

Atmospheric Black - USA

Ocellus

Progressive Metal - USA

Ocoai

Progressive Metal - USA

Octagon (USA)

Black Death - USA

Octavision

Progressive Metal - USA

October 31

Heavy Metal - USA

October Flame

Death Doom - USA

October Noir

Gothic Doom - USA

October Remorse

Doom Metal - USA