The Mantle

Progressive Metal - USA

The Mantors

Heavy Metal - USA

The March Ahead

Post Hardcore - USA

The Marion Crane Murder

Death Grind - USA

The Marker Effect

Deathcore - USA

The Marred

Stoner Doom - USA

The Maryrose Artifact

Death Metal - USA

The Mass

Technical Thrash - USA

The Massacre

Deathcore - USA

The Master's Apprentice

Melodic Black - USA

The Matt Parsons Band

Symphonic Death Black - USA

The Mausoleums

Ambiant Black - USA

The Melvins

Sludge Metal - USA

The Mentors

Thrash Metal - USA

The Merciless Concept

Deathcore - USA

The Mercury Riots

Hard Rock - USA

The Messiah Complex

Metalcore - USA

The Metal Shakespeare Company

Heavy Metal - USA

The Mezmerist

Melodic Heavy - USA

The Midnight Ghost Train

Stoner - USA

The Midnight Society

Crossover - USA

The Mighty Nimbus

Sludge Metal - USA

The Mighty Swine

Hard Rock - USA

The Miles Between

Metalcore - USA

The Militants

Thrash Metal - USA

The Mindless Expanse

Sludge Doom - USA

The Minor Times

Hardcore - USA

The Miracle Of You

Metalcore - USA

The Misanthrope Project

Sludge Doom - USA

The Misfits

Hardcore - USA

The Mob (USA-1)

Heavy Metal - USA

The Mob (USA-2)

Melodic Metal - USA

The Modern Prometheus

Deathcore - USA

The Mofo Homeboys

Crossover - USA

The Monarch (USA)

Groove Metal - USA

The Mongoloids

Crossover - USA

The Monk

Death Grind - USA

The Monroe Autopsy

Grindcore - USA

The Monster Of Florence

Hardcore - USA

The Monsters I've Met

Post Hardcore - USA

The Moor (USA)

Symphonic Black - USA

The Moreau Project

Deathcore - USA

The Mortis Sermon

Deathcore - USA

The Mosaic Window

Melodic Black - USA

The Moshketeers

Thrash Metal - USA

The Mother Station

Hard Rock - USA

The Mound Builders

Stoner - USA

The Munsens

Stoner Doom - USA

The Murdered

Crossover - USA

The Mustard Seeds

Progressive Metal - USA

The Muzzler

Crossover - USA

The Nain Rouge

Metalcore - USA

The Named

Industrial Electro - USA

The Narthex

Dark Ambient - USA

The National Cemetery Orchestra

Thrash Metal - USA

The Native Howl

Thrash Metal - USA

The Nauseating Stab

Metalcore - USA

The Nearly Deads

Grunge - USA

The Neologist

Melodic Death - USA

The Neon Hookers

Post Hardcore - USA

The Nephilim Terror

Melodic Death Black - USA

The Network

Hardcore - USA

The New Age

Metalcore - USA

The New Breed

Power Metal - USA

The New Low (USA)

Metalcore - USA

The New Order

Hard Rock - USA

The New Plague

Death Metal - USA

The New Violence

Post Hardcore - USA

The Next Columbine

Deathcore - USA

The Nightmare Stage

Progressive Power - USA

The Ninth Gate

Deathcore - USA

The No WTO Combo

Hardcore - USA

The Noctambulant

Melodic Black - USA

The North Sea

Drone - USA

The Nulll Collective

Funeral Doom - USA

The Number Twelve Looks Like You

Experimental Metal - USA

The Oath (USA)

Black Metal - USA

The Obelisk

Progressive Death - USA

The Obliterate Plague

Black Death - USA

The Obliteration Project

Experimental Metal - USA

The Obsessed

Doom Metal - USA

The Occultation Project

Melodic Death - USA

The Ocean Walker

Experimental Metal - USA

The Oceans Arms

Deathcore - USA

The Odious

Progressive Death - USA

The Odious Construct

Melodic Death - USA

The Offering

Metal - USA

The Ogre Packet Slammers

Brutal Death - USA

The Omega Experiment

Progressive Metal - USA

The Omniscientist

Progressive Metal - USA

The Ongoing Concept

Experimental Metal - USA

The Onslaught

Death Thrash - USA

The Oppressor

Deathcore - USA

The Optimist (USA-1)

Metalcore - USA

The Optimist (USA-2)

Post Hardcore - USA

The Orchatorium

Heavy Death - USA

The Order Of Elijah

Metalcore - USA

The Organization

Metal - USA

The Osedax

Sludge Doom - USA

The Other Half (USA-1)

Heavy Rock - USA