Obedient Chaos

Metalcore - Finland

Oberon (CZ)

Metalcore - Czechia

Obey The Brave

Metalcore - Canada

Object Of Aggression

Metalcore - USA

Obsek

Metalcore - Canada

Obyrne

Metalcore - Canada

Ocean Depths

Metalcore - Netherlands

Ocean Goddess

Metalcore - Italy

Ocean In Sight

Metalcore - Ukraine

Ocean Sleeper

Metalcore - Australia

Ocean's Aftermath

Metalcore - USA

Oceangraves

Metalcore - Mexico

Oceans

Metalcore - Austria

Oceans Apart

Metalcore - United-Kingdom

Oceans Asleep

Metalcore - France

Oceans Ate Alaska

Metalcore - United-Kingdom

Oceans Of December

Metalcore - USA

Oceans Will Part

Metalcore - USA

Oceans Will Rise

Metalcore - Canada

Odd Project

Metalcore - USA

Odessa

Metalcore - United-Kingdom

Of Blackest Oceans

Metalcore - New-Zealand

Of Buried Hopes

Metalcore - Belarus

Of Burning Empires

Metalcore - Canada

Of Concepts And Kings

Metalcore - Canada

Of Creations

Metalcore - USA

Of Divinity

Metalcore - Australia

Of Flight And Failure

Metalcore - USA

Of Ghost

Metalcore - United-Kingdom

Of Mice And Men

Metalcore - USA

Of Silence And Salvation

Metalcore - USA

Of Temples

Metalcore - Canada

Of The First Born Son

Metalcore - Canada

Of The Son

Metalcore - USA

Of Truth

Metalcore - USA

Of Virtue

Metalcore - USA

Of Whispers

Metalcore - Australia

Oh

Metalcore - USA

Oh The Irony

Metalcore - USA

Oh, Redeemer

Metalcore - USA

Oh, Sleeper

Metalcore - USA

Olethrio Rigma

Metalcore - Greece

Oltrezona

Metalcore - Italy

Omens Of Plague

Metalcore - Argentina

OMG

Metalcore - Russia

Omissions

Metalcore - USA

Omkara

Metalcore - Poland

On Broken Wings

Metalcore - USA

On The Verge Of Extermination

Metalcore - China

Once A King

Metalcore - Germany

Once Alive

Metalcore - Croatia

Once Godlike

Metalcore - Belgium

Once In A While

Metalcore - Italy

Once Nothing

Metalcore - USA

Once Pure

Metalcore - USA

Once We Killed

Metalcore - Germany

One Dead Three Wounded

Metalcore - USA

One Hour

Metalcore - Belgium

One Night Actress

Metalcore - Russia

One Rise Ion

Metalcore - Ukraine

One Size Fits All

Metalcore - France

One Year Later

Metalcore - USA

One's Own Blood

Metalcore - USA

Oni (CAN)

Metalcore - Canada

Only Silence

Metalcore - Brazil

Onward To Olympas

Metalcore - USA

Onward We March

Metalcore - USA

Ookami

Metalcore - France

Opal In Sky

Metalcore - Canada

Opalized

Metalcore - France

Oracle (UK-2)

Metalcore - United-Kingdom

Orchid's Curse

Metalcore - Canada

Orias

Metalcore - USA

Orient Fall

Metalcore - Hungary

Orinoco

Metalcore - USA

Orphelia

Metalcore - Brazil

Orpheus Note

Metalcore - Israel

Orwellian

Metalcore - USA

Os'Satur

Metalcore - France

Oscuro Diciembre

Metalcore - Mexico

Othello

Metalcore - USA

Our Anchored Hearts

Metalcore - Australia

Our Darkest Day

Metalcore - USA

Our Days Are Numbered

Metalcore - USA

Our Dying Dreams

Metalcore - USA

Our Hollow, Our Home

Metalcore - United-Kingdom

Our Imbalance

Metalcore - United-Kingdom

Our Last Breath

Metalcore - France

Our Reflections

Metalcore - Mexico

Our Souls Evolve

Metalcore - Canada

Our Transfixion

Metalcore - USA

OurLastBreath

Metalcore - Sweden

Out Of My Eyes

Metalcore - France

Out Of My League

Metalcore - Canada

Outcry

Metalcore - Italy

Outcryfire

Metalcore - United-Kingdom

Outer Glow

Metalcore - USA

Outlands

Metalcore - USA

Outrun The Gun

Metalcore - USA

Over The Reason

Metalcore - France