Mastodon

Blood Mountain	6
The Hunter	6

Mayhem

Ordo Ad Chao	8
De Mysteriis Dom Sathanas	7
Grand Declaration Of War	7
Esoteric Warfare	7

Megadeth

Peace Sells... But Who's Buying?	7
Rust In Peace	6
Youthanasia	6
Cryptic Writings	5

Megaherz

Wer Bist Du	7
Herzwerk II	6
5	6

Melechesh

Emissaries	7
Sphynx	6

Merrimack

Of Entropy And Life Denial

7

Meshuggah

Chaosphere	9
Destroy Erase Improve	8
Nothing	8
I [EP]	7
Contradictions Collapse	6
Catch Thirtythree	6
ObZen	5

Metallica

Master Of Puppets	8
Metallica	8
Ride The Lightning	7
...And Justice For All	7
Kill 'Em All	6
Load	5
Re-Load	5
St. Anger	4

Mgła

Presence [EP]

8

Midnight Odyssey

Aeon Odyssey [Split]

5

Ministry

The Mind Is A Terrible Thing To Taste	8
ΚΕΦΑΛΗΞΘ	8
The Land Of Rape And Honey	7
Rio Grande Blood	7
Filth Pig	6
The Last Sucker	6

Mirrorthrone

Carriers Of Dust	8
Gangrene	7

Misanthrope

IrremeDIABLE

5

Misery Index

The Killing Gods

7

Misery Signals

Controller

8

Misþyrming

Söngvar Elds Og Óreiðu

8

Mithras

Forever Advancing...... Legions	8
Behind The Shadows Lie Madness	6

Moanaa

Descent

7

Monarch

Mer Morte

7

Monolord

Empress Rising	8
No Comfort	6

Moonsorrow

Kivenkantaja	6
Verisäkeet	6

Moonspell

Irreligious	6
Memorial	6
Wolfheart	5

Morbid Angel

Altars Of Madness	8
Blessed Are The Sick	7
Covenant	7
Heretic	7
Domination	6
Formulas Fatal To The Flesh	6
Gateways To Annihilation	6
Illud Divinum Insanus	5

Morbus Chron

Sweven

7

Mord'A'Stigmata

Ansia

7

Morost

Solace In Solitude

6

Mors Principium Est

The Unborn	6
Inhumanity	5
Liberation = Termination	5

Mortals

Cursed To See The Future

5

Mortifera

Vastiia Tenebrd Mortifera

8

Motörhead

Ace Of Spades	7
Orgasmatron	7

Muck

Your Joyous Future

7

Mudvayne

The End Of All Things To Come

4

Murder Construct

Results

8

Murmuüre

Murmuüre

8

Mütiilation

Sorrow Galaxies

5

My Dying Bride

Songs Of Darkness, Words Of Light

6

Myrkskog

Superior Massacre

7

Myrkur

Myrkur [EP]

6

Mysticum

In The Streams Of Inferno

6

N.K.V.D.

Diktatura [EP]

7

Nachtmystium

The World We Left Behind	7
Eulogy IV [EP]	6

Nadja

Queller

7

Nae'blis

Sketches Of Reality

5

Naglfar

Sheol	7
Pariah	6

Nails

Unsilent Death	8
Abandon All Life	8
You Will Never Be One Of Us	7

Napalm Death

The Code Is Red... Long Live The Code	7
Smear Campaign	7
Time Waits For No Slave	7
Utilitarian	7
Apex Predator - Easy Meat	7

Nasum

Shift	8
Helvete	7