Subgenres

Metal  artists

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Our Mirage
Ozzy Osbourne
Orgy
Opeth
Ophthalamia
The Ossuary
Of Mice & Men
Operation: Mindcrime
Orbit Culture
Omnium Gatherum
Oblivion Protocol
Ondfodt
One of Nine
OSI
Overkill
Orden Ogan
Ofdrykkja
Otherwise
Orange Goblin
Otep
Oceana
Obituary
Our Last Night
The Ocean
Of Blood and Wine
Our Promise
Oathbreaker
Om
Orphaned Land
Oceans of Slumber
Oceans
Opera Diabolicus
Orchid
Oomph!
Obscura
Omnia
Operus
Oh, Sleeper
Oceans Ate Alaska
The Oath
The One Hundred
Oliva
Onslaught
The Obsessed
OAK
Once Human
The Offering
Our Hollow, Our Home
Old Gods of Asgard
Outshine
Obiat
Onlap
Oranssi Pazuzu
Ossuarium
Ocean of Grief
Orion's Reign
Omen
Ominum
Outworld
October Falls
Outrun the Sunlight
Old Man's Child
Obliteration
Outlaw Blood
One-Way Mirror
Orphaned Land & Amaseffer
Of Virtue
Obvurt
Onward
Of Modern Architecture
Obscure Infinity
O'Brother
One Minute Silence
Osada Vida
Overdrive
Origin
Omega Infinity
Ogre
Ocean Grove
The Overseer
Odious Mortem
Outrage
Okilly Dokilly
Obsequiae
Old Man Gloom
Ostura
One Without
Ouroboros
Oozing Wound
Oni
Off the Cross
October Tide
Oceano
Outer Heaven
Omnihility
Opium Warlords
Organectomy
Orphans of Dusk
Obey The Brave
On Thorns I Lay
Odium
Ov Sulfur
Ophiocordyceps
The Order of Elijah
Osiah
Outre-Tombe
The Otolith
Onkel Tom Angelripper
Opprobrium
Olympos Mons
Omega Massif
Octavia Sperati
Only Child
Otargos
Omnizide
Ostrogoth
Obelyskkh
OHHMS
The Organization
Oakenshield
Ophidian I
Orne
Omega Lithium
Orient Fall
Ordog
Opera IX
Old Funeral
On a Pale Horse
Outline
Oblique Rain
Overdose
Officium Triste
Obscurity
Overdream
Omotai
Odyssea
Okera
Ondskapt
Ocultan
Outcast
Orth
Our Subatomic Earth
Order of Ennead
Orcustus