Denver's Orm dwell in the slow, crushing overlap of sludge, drone, and doom metal, crafting music that moves like magma — deliberate, heavy, and indifferent to urgency. The Mile High altitude seems to have had no effect on their desire to go as low and slow as possible.

Colorado's Ormstunga — taking their name from Old Norse for "serpent tongue" — pair symphonic orchestration with ferocious black metal, building music that is simultaneously grandiose and venomous. Their dramatic approach has more in common with Scandinavian theater-black than the American underground.

Sterling, Virginia's Orna Annon have carried the Viking metal banner through the American mid-Atlantic underground since 2004, drawing on Norse myth and pagan imagery for music that is sweeping, martial, and steeped in lore. Longevity has only deepened their dedication to the tradition.

Scorching Doom / Black Metal out of Texas.

Washington state's Orphan Crusher deal exclusively in sludge metal, their music a blunt, distorted instrument of slow punishment that demands patience and rewards it with sheer physical impact. The name sets expectations; the music delivers on them.

Greenville, South Carolina's Orpheus Effect bring symphonic folk metal to the American Southeast with genuine orchestral ambition, pairing mythological themes with soaring arrangements that gesture toward European genre landmarks. They stand as one of the more distinctive acts in a region not typically associated with the style.

Peoria, Arizona's Orphium play straight-ahead thrash metal with no frills and no apologies — riff-forward, fast, and anchored in the classic Bay Area and Teutonic traditions that defined the genre's foundational decade. Since 2014 they've kept the flame burning in the Southwest desert.

Fuzzed-out Southern / Stoner Metal / Rock from Fort Worth.

Orthodox Straight Edge is a Nashville, Tennessee metalcore band formed in 2011 by vocalist Adam Easterling during his final year of high school, built around the band's commitment to straight-edge values and a sound that fuses metalcore aggression with nu-metal urgency. The lineup also includes guitarists Austin Evans and Ben Touchberry, bassist Shiloh Krebs, and drummer Mike White. Their music draws from Nashville's local hardcore scene while incorporating a theatrical vocal approach and the blastbeat-driven intensity of extreme metalcore.