Bands

Onfall

Italy · Hardcore (early); Melodic Death Metal/Metalcore (later)

On Paths of Torment

United States · Melodic Death Metal/Metalcore

Operation Cunt Destroyer

United Kingdom · Slam/Brutal Death Metal/Deathcore

Operio

Norway · Avant-garde/Technical Thrash/Death Metal

Optimistic Hedge Hog

Japan · Melodic Death Metal/Metalcore

Opus Death

Spain · Thrash/Death Metal/Crossover

Organharvest

United States · Brutal Death Metal

Oroku Saki and the Foot

United States · Experimental Death Metal/Grindcore

Ossiculum

United States · Funeral Doom/Death Metal

Ossification

Italy · Death Metal

Outnumber the Living

United States · Melodic Death Metal

OverBlack

India · Metalcore/Melodic Death Metal

Ozawar

Canada · Death/Thrash Metal

Painful Quandary

United States · Death Metal/Grindcore

Panhedonia

Finland · Death Metal

Pánico al Miedo

Spain · Death/Thrash Metal

Paranoid Despire

Indonesia · Death Metal

Parasomnia

United States · Technical Death Metal/Deathcore

Patterns of Decay

United States · Melodic Death Metal/Metalcore

Pavyon Geceleri

Türkiye · Brutal Death Metal

Paybak

United Kingdom · Death/Thrash Metal

Paymon

Poland · Death Metal/Hardcore

Penjelma

Indonesia · Death Metal

Pentakolo

Italy · Death/Thrash Metal