Artists — O
146 artists
- Oakenshield
- Oathbreaker
- Oathean
- Obituary
- Obliveon
- Oblomov
- Obscene Eulogy
- Obscura
- Obscurcis Romancia
- Obscurity
- Obsidian Gate
- Obskure Torture
- Obtained Enslavement
- Obtest
- Occult
- Oceano
- Oceans Of Sadness
- Octavia Sperati
- Octinomos
- October 31
- October Falls
- October Tide
- Odd Project
- Odes Of Ecstasy
- Odious
- Odious Mortem
- Odious Sanction
- Odium
- Odroerir
- Odyssea
- Ofermod
- Off Balance
- Offertorium
- Officium Triste
- Off Minor
- Of Graves And Gods
- Of Infinity
- Ohgr
- Oh, Sleeper
- Old
- Old Funeral
- Old Man Gloom
- Old Man's Child
- Oliver Magnum
- Olympos Mons
- Om
- Omega Lithium
- Omen
- Ominous Grief
- Omnium Gatherum
- On
- On a Warpath
- On Broken Wings
- Once And For All
- Ondskapt
- One 4 One
- One Dead Three Wounded
- One King Down
- One Less Reason
- One Life Crew
- One Life Crew/Empire Falls
- One Man Army And The Undead Quartet
- One Minute Silence
- One Nation Under
- Onesidezero
- One Step Too Many
- Only Crime
- Only Living Witness
- Onmyouza
- ON MY SIDE
- Onslaught
- On The Might Of Princes
- On The Rise
- On Thorns I Lay
- Onward
- Onward To Olympas
- Oomph!
- Opera Ix
- Opera Magna
- Operation Ivy
- Opeth
- Ophis
- Ophthalamia
- Oppressor
- Oracle
- Orakle
- Orange Goblin
- Oratory
- Orchid
- Orcivus
- Ordalium
- Orden Ogan
- Order From Chaos
- Order Of Ennead
- Order Of The Ebon Hand
- Ordo Draconis
- Ordo Equilibrio
- Ordog
- Organic Infest
- Orientacion
- Orientación
- Origin
- Orion Riders
- Orkest
- Orkrist
- Orodruin
- Orphanage
- Orphaned Land
- Orthanc
- Orthodox
- Osculum Infame
- Osi
- Ossastorium
- Otargos
- Otyg
- Our Side
- Outbreak
- Outburst
- Outlast
- Outlook
- Outnumbered
- Outrage
- Outrage (Belgium)
- Outspoken
- Out to win
- Outworld
- Overcast
- Overcome
- Overdose
- Overdream
- Overflash
- Overkill
- Overlife
- Overlorde
- Overmaster
- Over My Dead Body
- Over My Dead Body / Death Threat
- Oversoul
- Over The Top
- Overthrow
- Ov Hell
- Owen
- Owen Hart
- Owls
- Ownbloodz
- Ozzy Osbourne