Nuclear Omnicide

The Presence Of Evil	7
Bringers Of Disease [EP]	7

Nuclear Tomb

Offer Your Life [EP]	7
Succumbing [EP]	7
Terror Labyrinthian	7

Nucleus

Sentient	8
Hegemony [EP]	7
The Colony [EP]	7
Entity	7

Nucleus Torn

Knell

9

Nuke

Nuke

7

Num Skull

Ritually Abused

8

NYMF

Man's End	7
From The Dark	7

Obituary

Slowly We Rot	9
Cause Of Death	8
The End Complete	8
World Demise	7
Obituary	7

Obliteration

Total Fucking Obliteration [EP]	9
Perpetual Decay	8
Black Death Horizon	8
Nekropsalms	7
Cenotaph Obscure	7

Obliveon

From This Day Forward	9
Nemesis	8
Cybervoid	7

Obrero

Volume I: Tales From The Old West And Beyond [Demo]	7
Mortui Vivos Docent	7
The Infinite Corridors Of time	7

Obscenity

The 3rd Chapter

8

Obscura

Cosmogenesis	8
Omnivium	8
Illegimitation [Compilation]	8
Akróasis	8
Diluvium	8
A Valediction	8
Retribution	7

Obscure (NOR)

On Formaldehyde

8

Obsecration

Oblivious... [EP]	8
The Inheritors Of Pain	8
Oceanum Oblivione	8
Seeds Of A Pervert God	7
Vault Of The Obscure Vortex [EP]	7
Sins Of The Flesh	7
Onwards The Mystic Paths Of The Dead	7

Obsequiae

Suspended In The Brume Of Eos	7
Aria Of Vernal Tombs	7

Obsession

Methods Of Madness	9
Marshall Law [EP]	8
Scarred For Life	8

Obsidian Mantra

Existential Gravity

7

Obsidian Sea

Dreams, Illusions, Obsessions	8
Strangers	8
Pathos	8
Between Two Deserts	7

Occlith

Obscure Heresies [EP]	8
Gates, Doorways, And Endings	7

Occult Burial

Burning Eerie Lore	7
Hideous Obscure	7
Skeletal Laughter [EP]	7
Promo MMXIV [Demo]	7

Occultation

Three & Seven	8
Silence In The Ancestral House	8

Ocean Chief

Oden [Demo]	7
Tor	7
Den Förste	7
Universums Härd	7

Ockra

Infinite Patterns [EP]

8

October 31

No Survivors	8
Bury The Hatchet	8
Visions Of The End [EP]	7
Meet Thy Maker	7
Metal Massacre 31	7

October Tide

Rain Without End

7

Oddland

The Treachery Of Senses

8

Odious Mortem

Cryptic Implosion

7

Odyssey (RSA)

Odyssey

8

Of Gods & Monsters

Sons Of Armageddon

8

Of Rytes

Without...

7

Officium Triste

Ne Vivam	8
Demo '94 [Demo]	7
Roses On My Grave [EP]	7
Mountains Of Depressiveness [EP]	7
Officium Triste / Cold Mourning [Split]	7

Ogre

The Last Neanderthal	9
Dawn Of The Proto-Man	8
Seven Hells	8
Plague Of The Planet	8
Secondhand Demons [Compilation]	7
Thrice As Strong	7

Okular

Sexforce

7

Old Mother Hell

Old Mother Hell	7
Lord Of Demise	7

Old Night

Pale Cold Irrelevance	8
A Fracture In The Human Soul	8

Olde

Pilgrimage	7
Temple	7
Shallow Graves [EP]	7
I	7