Okkultist

O​.​M​.​E​.​N.

7

Oknos

From Ashes

4

Okular

Regenerate

6

Olamot

Path Of Divinity

6

Olathia

The Forest Witch

5

Old Corpse Road

On Ghastly Shores Lays The Wreckage Of Our Lore

4

Old Forest

Back Into The Old Forest	6
Mournfall	6
Sutwyke	6

Old Mother Hell

Lord Of Demise

5

Old Night

Ghost Light

5

Old Tower

Draconic Synthesis

5

Olde

Pilgrimage

7

Olde Throne

In The Land Of Ghosts

7

Olhava

Reborn	6
Sacrifice	5

Olkoth

At The Eye Of Chaos

7

Omega

Nebra

8

Omega Diatribe

Deviant	6
Metanoia	5

Omega Infinity

The Anticurrent

6

Omicida

Sacrifice The Bastard Son

7

Omination

NGR

8

Ominous Ruin

Amidst Voices That Echo In Stone

6

Ominous Scriptures

Rituals Of Mass Self​-​Ignition

6

Omission

Disciples Of Ravens Vengeance

6

Omnerod

The Amensal Rise

6

Omnium Gatherum

Origin

4

Omnivortex

Diagrams Of Consciousness	8
Circulate	7

On Thorns I Lay

Threnos	6
On Thorns I Lay	6

Once Awake

Once Awake

5

Once Human

Scar Weaver

7

Onda Makter

The Misanthropic Blasphemy

7

Ondfødt

Det Österbottniska M​ö​rkret

7

Ondskapt

Grimoire Ordo Devus

8

Onelegman

Event Horizon

3

Onheil

In Black Ashes

5

Oni

The Silver Line	5
Loathing Light	4

Onlap

Waves

2

Onmyo-Za

龍凰童子

6

Onslaught

Generation Antichrist

4

Ontborg

Following The Steps Of Damnation

6

Onward

Of Epoch And Inferno

6

Oomph!

Richter Und Henker

4

Oozing Wound

Blech	8
We Cater To Cowards	8

Opera Diabolicus

Death On A Pale Horse

6

Opera Magna

Of Love And Other Demons	5
Heroica	4

Ophidian Forest

Tales Of Doom And Ignorance

7

Ophidian I

Desolate

6

Ophis

Spew Forth Odium

7

Ophiuchi

Shibboleth

8

Opium Warlords

Nembutal

5

Opus Arise

The Network

3

Oranssi Pazuzu

Mestarin Kynsi

9

Orbit Culture

Shaman [EP]	6
Descent	5
Nija	4

Orbstruct

Deimos Falling

7

Orchid's Curse

The Decay [EP]

5

Orden Ogan

Final Days	5
Final Days: Orden Ogan And Friends	4

Orecus

Dreadnought

6

Oreyeon

Equations For The Useless

8

Organ Dealer

The Weight Of Being

7

Organectomy

Nail Below Nail

6

Origin

Chaosmos

6

Orion's Reign

The Bonus Sessions [EP]

4

Orkrist

Luea

2

Orm

Intet • Altet

6

Ornamentos Del Miedo

El Cosmos Me Observa En Silencio

4

Oro

Vid V​ä​gs Ände

6

Oromet

Oromet

6

Orphalis

As The Ashes Settle

6

Orphans Of Dusk

Spleen

5

Orphean Passage

Apart

6

Orpheus Omega

Portraits [EP]

5

Orplid

Deus Vult

6

Orthodox

Proceed

7

Orthodox (USA)

Learning To Dissolve

7

Orthodoxy

Ater Ignis

7

Orthostat

The Heat Death

6

Oryx

Lamenting A Dead World

4

Oshiego

Jaljalut

7

Osiah

Kairos	7
Chronos [EP]	6
Loss	5

Ósserp

Els Nous Cants De La Sibil·la

7

Ossilegium

The Gods Below

5

Ossuary Anex

Obscurantism Apogee

4

Otargos

Fleshborer Soulflayer

7

Otep

The God Slayer

5

Ou

II: Frailty

6

Oubliette

Eternity Whispers

6

Our Common Sense

Harbinger Of Calamity

5

Our Place Of Worship Is Silence

Disavowed, And Left Hopeless

7