Subgenres

Metal  artists

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