Nuclear Assault was formed in New York City in 1984 by bassist Dan Lilker following his departure from Anthrax and guitarist and vocalist John Connelly, quickly establishing themselves as one of the more politically outspoken acts in the American thrash metal scene. The band released six studio albums, with Survive (1988) and Handle with Care (1989) representing their commercial and critical peak, distinguished by sharp social commentary delivered over tightly wound thrash arrangements. The band broke up, reunited, and split again multiple times before fully retiring in 2022.

Nuclear Blaze formed in 2017 with a sound that weaponizes black metal's cold atmosphere against the sheer velocity of grindcore, producing something abrasive and nihilistic in equal measure. The band strips both genres down to their most brutal fundamentals, offering little mercy in the way of melody or breathing room. Their Bandcamp presence marks them as a fixture in the extreme underground.

Nuclear Power Trio is an instrumental progressive metal band from Denver, Colorado, formed in 2017 by Greg Burgess, Nick Schendzielos, and Pete Webber. The band performs in character as caricatures of Donald Trump, Vladimir Putin, and Kim Jong Un, framing technically demanding, often comedically titled instrumental compositions within a satirical conceit. Albums including A Clear and Present Rager and Wet Ass Plutonium (2023) demonstrate genuine instrumental facility beneath the high-concept presentation.

Ripping Death Metal / Grindcore out of Texas.

Out of Oklahoma City, Nuclear Wizard arrived in 2016 with a thrash metal attack grounded in the classic American tradition — tight riff construction, aggression, and momentum that rarely lets up. The Midwest setting gives their sound a certain blue-collar directness, absent the coastal scene posturing that sometimes dilutes the genre. They've kept the project alive and running for nearly a decade.

Cleveland's Nucleon came together in 2022 at the intersection of heavy metal and stoner metal, letting psychedelic drift pull against the gravity of traditional metal heaviness. The band draws on the Rust Belt's long history of loud, working-class rock while pushing into fuzzed-out, hypnotic territory. Still a young act, they've positioned themselves as part of a new wave of Ohio heavy music.

New Jersey's Nucleus has been pursuing a brand of stoner metal since 2013 that favors thick, rolling riffs and the kind of slow-burn intensity the genre does best. Their hard rock roots give the music a directness that keeps it accessible without softening the heaviness at its core. Over a decade of activity cements their place as a steady presence in the East Coast underground.

Out of Santa Ana, California, Nug have been pummeling eardrums with their brand of slam and brutal death metal since 2018. The band leans hard into bone-cracking breakdowns and guttural extremity, placing them squarely in the Southern California tradition of no-frills, bowel-loosening brutality.

San Antonio's Nuisance have been a cornerstone of the city's heavy underground since forming in 1988, outlasting trends through sheer weight and conviction. Their doom and sludge metal draws on decades of lived experience, delivering slow-burn punishment with the kind of grim authority that only comes from nearly forty years in the trenches.