Bands

Nuclear Hatred

United States · Crossover/Thrash Metal

Nuclear Massacre

United States · Death Metal/Grindcore

Nyktophobian

United States · Black Metal

Oakenwraith

United States · Black Metal

Obastra

United States · Progressive Death Metal/Deathcore

Obliteratus

United States · Depressive Black Metal

Obliti Devoravit

United States · Black Metal

Obsequies

United States · Black Metal

Obsidian Spine

United States · Black/Death Metal

Ocean of Ghosts

United States · Drone/Funeral Doom Metal/Dark Ambient/Shoegaze

Ocean of Obsession

United States · Progressive/Melodic Death Metal/Deathcore

Odar

United States · Raw/Depressive Black Metal

Old Moon

United States · Black Metal

Old Moon

United States · Melodic Black Metal

Ominous Hymn

United States · Black Metal

One Master

United States · Black Metal

OnlyGodIsPerfect

United States · Raw Black Metal/Noise

On Paths of Torment

United States · Melodic Death Metal/Metalcore

Onslaught

United States · Thrash Metal

Onward We March

United States · Groove Metal/Metalcore

Opaque Trials

United States · Atmospheric/Depressive Black Metal

Oppressive Descent

United States · Black Metal

Optimist

United States · Depressive Black Metal

Orange Diesel

United States · Stoner Metal/Rock