Norther

Circle Regenerated	9
Death Unlimited	8
Till Death Unites Us	7
N	7

Northlane

Obsidian

6

Nospūn

Opus

6

Nothingness

Supraliminal

6

Noumena

Absence	9
Anatomy Of Life	8

Novembers Doom

To Welcome The Fade	8
The Novella Reservoir	8
Into Night's Requiem Infernal	8
The Pale Haunt Departure	7
Aphotic	7
Bled White	7
Hamartia	7

Novembre

Classica	9
Novembrine Waltz	9
The Blue	8
Materia	7
URSA	7

Nuclear Assault

Handle With Care	9
Survive	9
Game Over	8
Something Wicked	8
Out Of Order	7

Numenorean

Adore

7

Obituary

Cause Of Death	9
Slowly We Rot	8
The End Complete	8
Back From The Dead	8
Frozen In Time	8
Obituary	8
Dying Of Everything	8
World Demise	7
Xecutioner's Return	7
Darkest Day	7
Inked In Blood	7

Obscura

Omnivium	10
Akróasis	9
Diluvium	9
A Valediction	9
Retribution	8
Cosmogenesis	8

Obscure Sphinx

Void Mother

8

Obsession

Carnival Of Lies	10
Scarred For Life	9
Methods Of Madness	9

Obsidian Tide

The Grand Crescendo

9

Obús

Prepárate

8

Ocean Of Grief

Pale Existence

9

Oceans Of Slumber

Oceans Of Slumber	8
The Banished Heart	7

October Tide

A Thin Shell	9
Rain Without End	8
The Cancer Pledge	7

Officium Triste

The Death Of Gaia	8
Mors Viri	7

Old Man's Child

Ill-Natured Spiritual Invasion	10
Revelation 666 - The Curse Of Damnation	10
The Pagan Prosperity	9
Born Of The Flickering	8
In Defiance Of Existence	7
Vermin	7
Slaves Of The World	7

Old Season

Archaic Creation

10

Olympos Mons

Conquistador	10
Medievil	10

Omen

Battle Cry	8
Warning Of Danger	8
Escape To Nowhere	7
Eternal Black Dawn	7

Omnerod

The Amensal Rise

7

Omnium Gatherum

The Redshift	9
New World Shadows	9
The Burning Cold	9
Spirits And August Light	8
Beyond	8
Years In Waste	7
Stuck Here On Snakes Way	7
Grey Heavens	7
Origin	7

Omnivortex

Circulate

8

Onslaught

Killing Peace	9
The Force	9
Power From Hell	9
VI	9
Generation Antichrist	9
Sounds Of Violence	8
In Search Of Sanity	7

Opera Magna

Poe

6

Opeth

The Roundhouse Tapes [Live]	10
The Roundhouse Tapes [DVD]	10
My Arms, Your Hearse	9
Still Life	9
Blackwater Park	9
Orchid	8
Deliverance	8
Damnation	8
Ghost Reveries	8