Obsidious

Iconic

7

Oceans

The Sun And The Cold	6
We Are Nøt Okay [EP]	6
Hell Is Where The Heart Is, Pt. III: Clarity [EP]	6
Hell Is Where The Heart Is	6
Hell Is Where The Heart Is Vol. I: Love And Her Embrace [EP]	5

Oceans Of Sadness

The Arrogance Of Ignorance	7
Mirror Palace	7
Send In The Clowns	7

Ofermod

Pentagrammaton	5
Tiamtü	4

Oh, Sleeper

Bloodied / Unbowed

7

Old Man's Child

Vermin	8
Revelation 666 - The Curse Of Damnation	7
In Defiance Of Existence	7
The Pagan Prosperity	6
Ill-Natured Spiritual Invasion	6
Slaves Of The World	6
Born Of The Flickering	5

Olhava

Reborn

8

Omega Infinity

Solar Spectre

6

Omnium Gatherum

New World Shadows	10
Beyond	9
Grey Heavens	8
The Burning Cold	7
Origin	7
Slasher [EP]	6

Once Human

Evolution	6
Scar Weaver	6
The Life I Remember	5

Ondfødt

Det Österbottniska M​ö​rkret

6

Ondskapt

Arisen From The Ashes

4

One Machine

The Final Cull	6
The Distortion Of Lies And The Overdriven Truth	5

One Man Army And The Undead Quartet

The Dark Epic...	7
Grim Tales	6

Onheil

Razor

6

Onirik

After Centuries Of Silence

4

Onirism

The Well Of Stars [EP]	7
Cosmic Dream	6

Opera IX

Anphisbena	7
The Black Opera: Symphoniae Mysteriorum In Laudem Tenebrarum	6
The Gospel	6

Opeth

Ghost Reveries	10
The Roundhouse Tapes [DVD]	9
Damnation	8
The Roundhouse Tapes [Live]	8
Orchid	7
Morningrise	7
My Arms, Your Hearse	7
Still Life	7
Blackwater Park	7
Deliverance	7
Watershed	7
Heritage	6
Pale Communion	6
Sorceress	6
In Cauda Venenum	6

Oracles

Miserycorde

7

Orakle

Tourments & Perdition

5

Oranssi Pazuzu

Värähtelijä

5

Orbit Culture

Nija	8
Rasen	7
Shaman [EP]	7

Orcustus

Orcustus

4

Order Of Orias

Ablaze

7

Origin

Omnipresent

6

Orpheus Omega

Bleed The Way	6
Wear Your Sins	5

Otargos

Xeno Kaos	8
Fuck God-Disease Process	7
No God, No Satan	7
Apex Terror	7
Kinetic Zero	6
Fleshborer Soulflayer	6

Ouroboros

Emanations

7

Outcast

Awaken The Reason

7

Ov Hell

The Underworld Regime

7

Ov Shadows

I Djävulens Avbild	7
The Darkness Between Stars	7

Ovid's Withering

Scryers Of The Ibis	8
Scryers Of The Ibits	8
Terraphage	6

Ozzy Osbourne

Blizzard Of Ozz	8
Diary Of A Madman	7
No More Tears	7
Black Rain	7
Ordinary Man	7
Patient Number 9	7

Pain

Coming Home

6

Pain Confessor

Incarcerated

7

Panopticon

.​.​.​And Again Into The Light

7

Pantera

Reinventing Hell [Compilation]	9
Cowboys From Hell	8
Vulgar Display Of Power	8
Reinventing The Steel	8

Pantheon I

Worlds I Create	8
The Wanderer And His Shadow	7
From The Abyss They Rise [Compilation]	5

Panzerchrist

Regiment Ragnarok

8