Omnium Gatherum

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
In Medias Res	8

Orbyssmal

Abyssom [EP]

2

Orden Ogan

Final Days: Orden Ogan And Friends	7
The Order Of Fear	7

Orecus

Dreadnought

8

Organectomy

Nail Below Nail

6

Origin

Chaosmos

6

Orkrist

Luea

4

Orm

Intet • Altet

7

Ornamentos Del Miedo

Frío [EP]	7
El Cosmos Me Observa En Silencio	6

Orob

Aube Noir

7

Oromet

Oromet

7

Ôros Kaù

Thanatos

6

Orphalis

As The Ashes Settle

7

Orphans Of Dusk

Spleen

7

Orphean Passage

Apart

7

Orpheus Omega

Emberglow	8
Wear Your Sins	7
Portraits [EP]	6

Orthodox (USA)

Learning To Dissolve

6

Orthostat

The Heat Death

6

Osiah

Kairos	9
Kingdom Of Lies	8
Loss	7
Chronos [EP]	7

Osiris

Meanders A Soul​.​.​.

7

Ossaert

Offerdier

6

Ósserp

Els Nous Cants De La Sibil·la

6

Ossilegium

The Gods Below

6

Otep

Hydra	6
The God Slayer	4

Other World

Tenebrous

7

Otyg

Sagovindars Boning

5

Ou

One

6

Our Hollow, Our Home

Hope & Hell

7

Outer Heaven

Realms Of Eternal Decay	7
Infinite Psychic Depths	6

Outergods

A Kingdom Built Upon The Wreckage Of Heaven

6

Outlaw

Reaching Beyond Assiah

7

Outworld

Outworld

3

Ov Hell

The Underworld Regime

8

Ov Shadows

Heresiarch

8

Ov Sulfur

The Burden Ov Faith	10
Stained In Rot	7
Wide Open [Single]	5

Overkill

Ironbound

7