Origin

Echoes Of Decimation	8
Omnipresent	8
Unparalleled Universe	8
Chaosmos	8

Orphalis

The Birth Of Infinity	8
The Approaching Darkness	8
As The Ashes Settle	8

Orphanage

By Time Alone	7
Inside	7
Driven	7

Orphaned Land

Mabool: The Story Of The Three Sons Of Seven	9
The Never Ending Way Of ORwarriOR	8
El Norra Alila	7
All Is One	7
Unsung Prophets & Dead Messiahs	7

Orthodox

Amanecer En Puerta Oscura	8
Sentencia	7
Baal	7

Orthodoxy

Novus Lux Dominus

7

Osiah

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

Ósserp

Sang I Sutge	8
Al Meu Pas S'alça La Mort	8
Els Nous Cants De La Sibil·la	8

Ossilegium

The Gods Below

7

Otep

Sevas Tra	8
Jihad [EP]	8
Generation Doom	7
House Of Secrets	6
Atavist	6
The Ascension	5
Hydra	4
Kult 45	4

Oubliette

Eternity Whispers	8
The Passage	7

Ouroboros

Glorification Of A Myth	8
Emanations	8

Outre

Hollow Earth	8
Ghost Chants	7

Ov Sulfur

The Burden Ov Faith

7

Over Your Threshold

Facticity

8

Overkill

The Years Of Decay	8
Horrorscope	8
Necroshine	8
Ironbound	8
Scorched	8
Feel The Fire	7
Taking Over	7
Under The Influence	7
Wrecking Everything [Live]	7
Killbox 13	7
!!!Fuck You!!! [EP]	7
The Electric Age	7
White Devil Armory	7
The Grinding Wheel	7
The Wings Of War	7

Overoth

The Forgotten Tome

7

Ovid's Withering

The Cloud Gatherer [EP]	8
Terraphage	8
Scryers Of The Ibis	7

Ozzy Osbourne

No Rest For The Wicked

7

Pain Of Salvation

Remedy Lane

6

Pandemonium (SWE)

Monuments Of Tragedy

7

Pantera

Cowboys From Hell	10
Vulgar Display Of Power	10
Official Live: 101 Proof [Live]	10
Far Beyond Driven	8
The Great Southern Trendkill	8

Pantokrator

Marching Out Of Babylon

6

Panzerballett

Panzerballett	8
Planet Z	8
Tank Goodness	7
Breaking Brain	7

Panzerfaust

The Suns Of Perdition - Chapter I: War, Horrid War	8
The Lucifer Principle [EP]	8
The Suns Of Perdition - Chapter II: Render Unto Eden	8
The Suns Of Perdition - Chapter III: The Astral Drain	8

Paradise Lost

Medusa	8
The Plague Within	7

Paradox

Product Of Imagination	7
Heresy	7
Collision Course	7
Riot Squad	7
Tales Of The Weird	7
Pangea	7

Paranorm

Empyrean

9

Parasite Inc.

Time Tears Down	8
Dead And Alive	7
Cyan Night Dreams	7

Parkway Drive

Horizons	9
Killing With A Smile	8
Deep Blue	7
Atlas	7
IRE	7
Reverence	7
Darker Still	7
Don't Close Your Eyes [EP]	6

Pathology

The Everlasting Plague

9