One Starving Day

Hardcore - Italy

Onfall

Deathcore - Italy

Onicectomy

Brutal Death - Italy

Onirica

Black Metal - Italy

Oniricide

Symphonic Metal - Italy

Onirik (ITA)

Brutal Death - Italy

Oniromantic

Gothic Metal - Italy

Onirot

Dark Ambient - Italy

Onryo (ITA)

Technical Death - Italy

Ontborg

Melodic Death Black - Italy

Onydia

Progressive Metal - Italy

Onyricon

Progressive Metal - Italy

Ooze

Sludge Metal - Italy

Opening Scenery

Progressive Power - Italy

Opera IX

Black Metal - Italy

Opera Nera

Gothic Black - Italy

Opera Oscura

Melodic Metal - Italy

OperaNoire

Gothic Metal - Italy

Ophiocordyceps

Brutal Death - Italy

Ophiura

Progressive Metal - Italy

Ophydian

Thrash Heavy - Italy

Ophyra

Thrash Death - Italy

Opium (ITA)

Dark Ambient - Italy

Opposite Sides

Technical Death - Italy

Opthalidon

Industrial Metal - Italy

Opus Dei (ITA)

Heavy Rock - Italy

Opus Maledicta

Symphonic Black - Italy

Opus Malefici

Black Death - Italy

Opus Mortifer

Black Metal - Italy

Ora Nombro

Progressive Metal - Italy

Oracle (ITA)

Black Metal - Italy

Oracle Sun

Power Metal - Italy

Oraculum (ITA)

Ambiant Black - Italy

Orange Blossom Jam

Atmospheric Doom - Italy

Orbe

Post Hardcore - Italy

Orbicate

Death Metal - Italy

Orchid (ITA)

Black Metal - Italy

Orcrist

Black Metal - Italy

Ordahlia Nera

Symphonic Metal - Italy

Ordalia (ITA)

Doom Metal - Italy

Ordeal (ITA)

Dark Ambient - Italy

Order Of Minerva

Melodic Heavy - Italy

Order Of Thy Tyrant

Dark Ambient - Italy

Order Ov Riven Cathedrals

Technical Death - Italy

Ordo564 Goatsemen

Ambiant Black - Italy

Oreyeon

Stoner Doom - Italy

Organa

Folk Metal - Italy

Organic

Death Metal - Italy

Organic Illusion

Metal - Italy

Orgg

Black Metal - Italy

Orghia

Thrash Death - Italy

Orgiastic Pleasures

Black Death - Italy

Orgrel

Black Metal - Italy

Orhorho

Black Metal - Italy

Orifice

Porno Gore Grind - Italy

Orion (ITA)

Power Metal - Italy

Orion Riders

Melodic Power - Italy

Orodreth

Death Metal - Italy

Orthodox (ITA)

Thrash Death - Italy

Ortro

Black Metal - Italy

Orve

Black Metal - Italy

Osian

Gothic Dark - Italy

Osiris (ITA)

Folk black - Italy

Ossario

Thrash Black - Italy

Osseltion

Technical Death - Italy

Ossidiana

Symphonic Metal - Italy

Ossimoro

Stoner - Italy

Otehi

Stoner Doom - Italy

Other View

Heavy Metal - Italy

Other World (ITA)

Heavy Metal - Italy

Otivm

Progressive Death - Italy

Ottone Pesante

Alternative Metal - Italy

Ouroboros (ITA)

Dark Ambient - Italy

Out For A Kill

Thrash Metal - Italy

Outbreak (ITA)

Thrash Metal - Italy

Outcry

Metalcore - Italy

Outrage (ITA)

Thrash Metal - Italy

Outsider (ITA)

Crossover - Italy

Over (ITA)

Thrash Metal - Italy

Over Dead In Over

Death Thrash - Italy

Overactive

Death Metal - Italy

Overage

Heavy Metal - Italy

Overblood

Death Thrash - Italy

Overcharge

Speed Metal - Italy

Overcrown

Symphonic power - Italy

Overdose (ITA)

Thrash Metal - Italy

Overfaith

Thrash Death - Italy

OverKhaos

Progressive Metal - Italy

OverMaster

Power Metal - Italy

Overnight

Avantgardiste Black - Italy

Overnight Sensation

Heavy Rock - Italy

Overock

Heavy Metal - Italy

Overtures

Progressive Power - Italy

Overwhelm

Thrash Heavy - Italy

OvO

Drone - Italy

Ovskum

Black Metal - Italy

Oylokon

Thrash Death - Italy

Ozawabeach

Thrash Metal - Italy

Pagan Wind (ITA)

Death Metal - Italy

Paganfuries

Pagan Black - Italy