October Tide

Winged Waltz	7
The Cancer Pledge	7

Octoploid

Beyond The Aeons

8

Oddland

Vermilion

7

Odious

Equilibrium Tool

8

Of Feather And Bone

Sulfuric Disintegration

7

Of Mice & Men

Earthandsky	7
Echo	5

Ofermod

Mysterium Iniquitatis	6
Ofermodian Litanies [EP]	6

Officium Triste

Giving Yourself Away	10
Reason	8
The Pathway	8
Charcoal Hearts - 15 Years Of Hurt - [Compilation]	8
Hortus Venenum	8
Morose [Single]	7

OHHMS

Rot

4

Okkultist

O​.​M​.​E​.​N.

7

Okular

Regenerate

6

Olamot

Path Of Divinity

7

Old Corpse Road

On Ghastly Shores Lays The Wreckage Of Our Lore

6

Old Forest

Sutwyke	7
Graveside	6

Old Man's Child

In Defiance Of Existence	8
Slaves Of The World	8
The Pagan Prosperity	7
Revelation 666 - The Curse Of Damnation	7

Olde Throne

In The Land Of Ghosts

7

Olhava

Sacrifice	6
Frozen Bloom	5
Reborn	4

Olim

Ursine

6

Olio Tähtien Takana

Spectral Katharsis

6

Olkoth

At The Eye Of Chaos

7

Olympus Mons

Healer

7

Omega Diatribe

Deviant

8

Omicida

Sacrifice The Bastard Son

5

Ominous Ruin

Amidst Voices That Echo In Stone

5

Ominous Scriptures

Rituals Of Mass Self​-​Ignition

5

Omission

Disciples Of Ravens Vengeance

5

Omnerod

Arteries	8
Construction [EP]	8
The Amensal Rise	7
Panspermia [EP]	7

Omnicidal

The Omnicidalist

7

Omnium Gatherum

Beyond	9
Years In Waste	8
Spirits And August Light	8
Stuck Here On Snakes Way	8
The Redshift	8
Origin	8
The Burning Cold	7
Slasher [EP]	7

Omnivortex

Circulate	8
Diagrams Of Consciousness	7

On Thorns I Lay

On Thorns I Lay

8

Once Awake

Bridgeburner	8
Once Awake	8

Once Human

Scar Weaver

6

Ondfødt

Dödsrikets Kallelse	8
Det Österbottniska M​ö​rkret	8
Oldfodt [EP]	8

Oneiros

Ruminations

8

Onelegman

Event Horizon

6

Onheil

In Black Ashes

7

Oni

The Silver Line	7
Loathing Light	6

Onlap

Never Too Late [EP]

6

Onslaught

Generation Antichrist

6

Ontborg

Following The Steps Of Damnation

8

Oomph!

Sperm	6
Richter Und Henker	6

Oozing Wound

We Cater To Cowards

6

Opera IX

Maleventum	9
Sacro Culto	8
Anphisbena	8
The Black Opera: Symphoniae Mysteriorum In Laudem Tenebrarum	8

Opeth

Orchid	8
Morningrise	8
Still Life	8
Blackwater Park	8
Deliverance	8
Lamentations [DVD]	8
Ghost Reveries	8
Watershed	8
Pale Communion	8
In Cauda Venenum	8
The Last Will And Testament	8
My Arms, Your Hearse	7
Damnation	7

Ophis

Spew Forth Odium

7

Oranssi Pazuzu

Mestarin Kynsi	7
Muuntautuja	7

Orbit Culture

Redfog [EP]	10
Nija	10
Shaman [EP]	10
Vultures Of North [Single]	10
The Forgotten [EP]	10
Rasen	9
Descent	9