Old Nick

Black Metal - USA

Old Pagan

Black Metal - Germany

Old Quantum

Black Metal - France

Old Ritual

Black Metal - Italy

Old Spectre

Black Metal - Brazil

Old Throne (BRA)

Black Metal - Brazil

Old Wainds

Black Metal - Russia

Olde

Black Metal - Ireland

Oldeath

Black Metal - Chile

Oldfiend

Black Metal - USA

Oldowan Gash

Black Metal - USA

Olio Tähtien Takana

Black Metal - Finland

Olkoth (USA-1)

Black Metal - USA

Olm

Black Metal - USA

Olovan

Black Metal - Czechia

Oltretomba (ITA)

Black Metal - Italy

Olzirtox

Black Metal - USA

Omasum

Black Metal - Spain

Ombrage

Black Metal - Canada

Omega (MEX)

Black Metal - Mexico

Omega Apeiron

Black Metal - Italy

Omega Infinity

Black Metal - Other

Omega Of Existence

Black Metal - Mexico

Omegaeternum

Black Metal - France

Omegalpha

Black Metal - Brazil

Omen (MLS)

Black Metal - Malaysia

Omen Ov Torment

Black Metal - USA

Omenfilth

Black Metal - Philippines

Omenloth

Black Metal - Greece

Omens Thorns

Black Metal - Hungary

Omheten

Black Metal - Sweden

Omicron (ITA)

Black Metal - Italy

Ominous (ESP)

Black Metal - Spain

Ominous (FIN)

Black Metal - Finland

Ominous Hymn

Black Metal - USA

Ominous Resurrection

Black Metal - USA

Ominous Torment

Black Metal - Spain

Ominous Yum Cimil

Black Metal - Mexico

Omitir

Black Metal - Portugal

Omnia Orta Cadunt

Black Metal - Russia

Omnicide (RUS)

Black Metal - Russia

Omnicide (USA)

Black Metal - USA

Omut (RUS)

Black Metal - Russia

Once Emperor

Black Metal - Russia

Ond Aand

Black Metal - France

Onda Makter

Black Metal - Sweden

Ondfødt

Black Metal - Finland

Ondskapt

Black Metal - Sweden

Ondske

Black Metal - Sweden

One (ITA)

Black Metal - Italy

One Master

Black Metal - USA

One Of Nine

Black Metal - USA

One Tail, One Head

Black Metal - Norway

Oneiric Eclipse

Black Metal - USA

Onethium

Black Metal - USA

Onheil

Black Metal - Netherlands

Onheilig

Black Metal - South-Africa

Onimous Grim

Black Metal - USA

Onirica

Black Metal - Italy

Onirik (POR)

Black Metal - Portugal

Oniromancia

Black Metal - France

Onlihtan

Black Metal - United-Kingdom

Only Darkness

Black Metal - France

OnlyBadEndings

Black Metal - Austria

Onrust (NL)

Black Metal - Netherlands

Ontos

Black Metal - United-Kingdom

Opacus

Black Metal - United-Kingdom

Opaque Blue

Black Metal - Bosnia and Herzegovina

Open Grave (USA-1)

Black Metal - USA

Open Hell

Black Metal - Poland

Opera IX

Black Metal - Italy

Operation Volkstod

Black Metal - Germany

Operation Winter Mist

Black Metal - Canada

Opethian

Black Metal - Brazil

Opferblut

Black Metal - Canada

Opfern

Black Metal - Spain

Opfertod

Black Metal - Czechia

Ophian

Black Metal - USA

Ophidian Coil

Black Metal - Serbia

Ophidian Forest

Black Metal - USA

Ophidian Malice

Black Metal - Russia

Ophiel

Black Metal - USA

Ophthalamia

Black Metal - Sweden

Opiatdöd

Black Metal - Sweden

Opositor (COL)

Black Metal - Colombia

Opositor (HUN)

Black Metal - Hungary

Oppenheimer

Black Metal - USA

Opposite Devotion

Black Metal - Mexico

Oppress

Black Metal - United-Kingdom

Oppressive Descent

Black Metal - USA

Oppressive Light

Black Metal - Other

Optoletum

Black Metal - Norway

Opus 666

Black Metal - Brazil

Opus Dei (USA)

Black Metal - USA

Opus Diaboli

Black Metal - Uruguay

Opus Draconis

Black Metal - Portugal

Opus Forgotten

Black Metal - Norway

Opus Magorum

Black Metal - Greece

Opus Mortem

Black Metal - Sweden

Opus Mortifer

Black Metal - Italy