Nuclear Assault

Game Over

7

Nuclear Power Trio

Wet Ass Plutonium

8

Nucleus Torn

Street Lights Fail

7

Nug

Alter Ego

8

Nuke

Nuke

8

Númenor

Colossal Darkness

7

Numenorean

Adore	9
Home	8

Nyktophobia

What Lasts Forever	8
To The Stars	7

O

Antropocene

7

O Zorn!

Vermillion Haze	7
Your Killer	6

Oak

Disintegrate

8

Oak Pantheon

The Absen­ce	7
In Pieces	6

Oath Of Cranes

The Unsung Mantras

9

Oath To Vanquish

Applied Schizophrenic Science

5

Oathbreaker

Rheia

8

Obed Marsh

Dunwich

8

Obituary

Slowly We Rot	8
Cause Of Death	8
World Demise	8
Dying Of Everything	8
Obituary	7
Back From The Dead	6

Oblivionized

Life Is A Struggle, Give Up

5

Obscura Qalma

Apotheosis

7

Obscure Sphinx

Epitaphs

8

Obscuring Veil

Fleshvoid To Naught

7

Obscurity

Streitmacht

8

Obsequiae

The Palms Of Sorrowed Kings	9
Aria Of Vernal Tombs	8

Obsidian Kingdom

A Year With No Summer	7
Torn & Burnt - The Mantiis Remixes [Compilation]	6

Obsidian Tide

The Grand Crescendo

8

Obsidyen

Litany Of Iah

8

Obsolete

Animate//Isolate

8

Ocean Of Grief

Pale Existence

8

Oceano

Revelation	6
Living Chaos	6
Depths	5

Oceans Of Slumber

Winter

7

October Tide

Winged Waltz

8

Octoploid

Beyond The Aeons

8

Ode And Elegy

Ode And Elegy

8

Odious

Mirror Of Vibrations

5

Odraza

Esperalem Tkane	8
Rzeczom	8

Odz Manouk

Bosoragazan (​Բ​ո​ս​ո​ր​ա​գ​ա​զ​ա​ն​)	7
Ծ​ո​ւ​ռ (Tzurr)	6

Ofdrykkja

After The Storm

6

Offerbeest

Afrika

7

Officium Triste

The Death Of Gaia	8
Hortus Venenum	8
Mors Viri	6

Ofnus

Time Held Me Grey And Dying

8

Oghre

Grimt

8

OHHMS

Rot

7

Okazaki Fragments

Abandoned

5

Okkultist

O​.​M​.​E​.​N.

8

Old One

Old One

6

Old Tower

The Last Eidolon	7
The Rise Of The Specter	7

Oleg Izotov

Vector	9
Silve(R)aY [EP]	8
Сто Восемнадцать	8
Stay Forever [EP]	7

Om

Conference Of The Birds	8
Advaitic Songs	8
God Is Good	7

Omb

SwineSong

9

Omega Diatribe

Metanoia

6

Omen

Battle Cry	8
Hammer Damage	5

Omit

Medusa Truth, Part 1

8

Omnerod

The Amensal Rise	8
Ivory Dune	7

Omnium Gatherum

Beyond	8
The Burning Cold	8
Grey Heavens	7
Origin	7

Omnivortex

Circulate

8

Område

Nåde

7

On Thorns I Lay

Threnos	9
Aegean Sorrow	8
On Thorns I Lay	8

Onheil

In Black Ashes

8

Onirism

Cosmic Dream

6

Onlap

Waves

4

Onslaught

The Force	8
VI	8
Power From Hell	6

Ooluu

Ophus

6

Opeth

Still Life	9
Blackwater Park	9
Watershed	9
Orchid	8
Deliverance	8
Ghost Reveries	8