Bands
Obscure Oracle
Melodic Black/Death Metal · San Angelo, TX
Disbanded
Obsidian
Heavy Metal · Dallas/Fort Worth, TX
Disbanded
Obsidian Throne
Melodic Death Metal · Fort Worth, TX
Ocanthus
Gothic/Melodic Doom Metal · Arlington, TX
Oceans of Slumber
Progressive Metal/Rock · Houston, TX
Oculus of Profanations
Death Metal · Del Rio, TX
Disbanded
Odious
Thrash Metal · Arlington, TX
Disbanded
Of Allegiance
Thrash/Doom Metal · Grand Prairie, TX
Of Forsaken Divinity
Experimental Ambient Black Metal · Weslaco, TX
Of the Fallen
Melodic Deathcore/Death Metal · Houston, TX
Oh, the Depth
Symphonic Deathcore · Houston, TX
Disbanded
Omega Thesis
Technical Doom Metal · Dallas/Fort Worth, TX
Omen of Death
Black Metal/Ambient · Conroe, TX
Omission
Thrash Metal/Crossover · Dallas, TX
Omnimorph
Post-Metal · Denton, TX
OmniTerror
Death Metal · Fort Worth, TX
Omotai
Progressive Sludge Metal · Houston, TX
Disbanded
One Last Torture
Groove/Death/Nu-Metal/Metalcore · Houston, TX
One We Created
Technical Death Metal/Deathcore · San Antonio, TX
Disbanded
Oppressive Force
Brutal Death Metal/Grindcore · San Antonio, TX
Orangutan Juice
Sludge/Stoner/Doom Metal · Corpus Christi, TX
Orcanaut
Progressive Stoner/Sludge Metal · Denton, TX
Disbanded
Orchiectomy
Brutal Death Metal/Goregrind · Houston, TX
Order of Bileth
Black Metal · Mission, TX
Orthodox Fuzz
Southern/Stoner Metal/Rock · Fort Worth, TX
Disbanded
Ossuarist
Death Metal/Grindcore · Plano, TX
Otherwise Dead
Metalcore/Groove Metal · Plano, TX
Outpost 31
Crossover/Thrash Metal · Houston, TX
Overt Enemy
Thrash Metal · Mission, TX
Ovnev
Atmospheric Black Metal · Spring, TX
Ox Combine
Thrash Metal · Fort Worth, TX
P.L.F.
Grindcore · Houston, TX
Paegan
Death Metal · Seguin, TX
Panteon
Death/Black Metal · Brownsville, TX
Pantera
Glam/Heavy Metal · Arlington, TX
Panzram
Industrial/Black/Doom Metal/Ambient · Lubbock, TX
Disbanded
Parabstruse
Experimental Black Metal · Grand Prairie, TX
Paradox
Disbanded
Doom Metal · Lubbock, TX
Paranoia Form
Technical Death Metal/Deathcore · Austin, TX
Path of Fire
Brutal Death Metal · Livingston, TX
Peisithanatos
Depressive Black Metal · San Antonio, TX
Disbanded
Penalty Kill
Groove Metal · Grand Prairie, TX
Penumbra Muerte
Black Metal · Dallas, TX
Disbanded
Permafrost
Black Metal · Austin, TX
Disbanded
Persecution Complex
Power Metal · Dallas/Fort Worth, TX
Phantom-X
Power Metal · Dallas, TX
Disbanded
Phonetica
Thrash/Groove Metal · Killeen, TX
Pipe Dream
Disbanded
Hard Rock/Groove/Southern Metal · New Braunfels, TX