Boston's Gas Attack has been delivering volatile crossover thrash since 2012, tapping the city's deep punk and hardcore roots and fusing them with metal's aggression. Fast, blunt, and built to start pits.

Out of Arlington Heights, Illinois, Gas Mask Catalogue melds melodic death metal's harmonic drive with metalcore's cathartic dynamics, carving out a sound that's been evolving since 2009. The Chicago suburbs have produced a band with broader stylistic ambition than their geography might suggest.

New Castle, Pennsylvania thrash act Gaschamber has been grinding through the genre with blue-collar determination since 2013, rooted in the classic tradition of riff-heavy, mid-tempo aggression. Pennsylvania's industrial corridor produced a fittingly grim project.

Eugene, Oregon's Gash hits with the blunt force of meat-and-potatoes death metal — straightforward, ugly, and deliberate. Formed in 2018, they operate in Oregon's growing extreme metal underground with no interest in softening anything.

Baltimore's Gash — distinct from the Oregon act of the same name — injects hardcore's hostile energy directly into death metal's DNA, producing something punkier and more caustic than either genre alone. Active since 2018 in one of the mid-Atlantic's most active underground scenes.

Freshly formed in 2025 out of Coeur d'Alene, Idaho, Gash Mallet arrived swinging with slam and brutal death metal at its most blunt and physical. The project joins a growing wave of Pacific Northwest bands pushing the genre's most extreme limits.

Fort Collins, Colorado's GasHead has been fusing the mathematical rigor of progressive metal with thrash's forward momentum since 2003, carving a distinctive niche in Colorado's heavy underground. The result is technical but still volatile, smart but unwilling to sit still.

Alexandria, Virginia's Gasmask616 pulls from melodic death metal, deathcore, and beyond, treating genre as a suggestion rather than a constraint. Active since 2021, they've built a catalog that moves fluidly across the extreme metal spectrum.

Los Angeles experimental outfit GASP has been pushing at the edges of sludge metal and hardcore since 2009, folding in noise, feedback, and abrasive texture until the genre lines dissolve entirely. Their music is confrontational and unpredictable, shaped by LA's eclectic and uncompromising DIY underground.