Boston's Glacial Hell combine death metal's heaviness with hardcore's relentless forward aggression, producing music that's fast, confrontational, and brutally efficient. They've been part of the Massachusetts extreme underground since 2017.

Denver's Glacial Tomb work in a devastating three-way collision of black, death, and sludge metal, and the result sounds like being buried under a collapsing mountain in the coldest possible winter. Formed in 2017, they're one of Colorado's most formidable extreme acts.

Portland, Oregon's Glacier revive the classic traditions of heavy and power metal with a reverence for melody, soaring vocals, and anthemic songwriting that feels earnest rather than nostalgic. Active since 2013, they're a bright light in the Pacific Northwest's heavier underground.

Oakland's Glacier Eater came out swinging in 2015 with melodic thrash built for the Bay Area blacktop — tight, aggressive, and shot through with lead guitar hooks that cut clean through the speed. They share a lineage with the thrash giants who built the scene around them.

Blurring the line between arena-ready grit and heavy metal muscle, Gladiator channels both the swagger of grunge and the blunt force of classic metal into something that sounds worn-in and battle-tested. They've been at it since 2010 with no signs of laying down the sword.

Named after the short sword of the Roman legionary, Atlanta's Gladius wields traditional heavy metal like an instrument of precision — focused, punishing, and rooted in the old ways. Since 2011 they've kept the Southern underground stocked with pure steel.

Raw, unpolished, and deliberately hostile, Glaive strips black metal back to its most primitive essentials — primitive tremolo lines, blizzard-blast drumming, and vocals dragged up from the frost. A project born in 2020 with no interest in compromise.

A newcomer from Columbus, Ohio, Glamoury arrived in 2025 bringing doom metal with an air of mystery bound up in its name — glamoury being an old word for enchantment or illusion. What they deliver is anything but an illusion: heavy, slow, and consuming.

Portland's Glasghote drags sludge through the mud of doom, coiling feedback and suffocating low-end into something that sounds like the Pacific Northwest itself — wet, gray, and pressing down. Since 2017 they've been one of the city's most punishing underground outfits.