Des Moines's Second Side have been navigating the space between thrash aggression, groove-metal momentum, and alternative metal experimentation since 2015. The Iowa trio's approach resists easy categorization — the thrash instincts keep things sharp and forward-moving, while the alternative influences introduce texture and dynamics that prevent the sound from calcifying into formula. They're a product of the Midwest DIY underground where versatility is a survival trait.

New York death metal outfit Secrecy have been carving out their corner of the underground since 2014, delivering the kind of dense, uncompromising brutality the state's metal scene has long been known for. Their approach favors heaviness over accessibility, rooting itself in the cavernous traditions of American death metal without apology.

Los Angeles avant-garde death metal project Secrelict emerged in 2023 with a mandate to push the genre past its conventional borders, blending dissonance, unconventional structures, and experimental textures into a distinctly modern form of extremity. The band's approach treats death metal as a starting point rather than a destination, fracturing familiar heaviness into something genuinely unsettling.

Los Angeles heavy metal act Secular Stranger draw from the classic tradition without surrendering to nostalgia — their music has the weight and craft of the genre's foundational era filtered through a contemporary perspective. Since forming in 2014, they've pursued a style that prioritizes strong songwriting and muscular riffs over either retro cosplay or modern reinvention.

Fresh out of Huntington Beach, California, Secularis arrived in 2025 as one of the newest entries in the American black/death underground, combining the icy hostility of black metal with the visceral attack of death metal. Even at this early stage, the project signals a willingness to operate in the extremes where both genres converge most violently.

Portland, Oregon black metal project Secundus emerged in 2020 from a city with a quietly deep underground metal tradition, channeling the raw and atmospheric strains of the genre into something with a distinctly Pacific Northwest character. Their Bandcamp presence under the handle secunduspdx marks them as a local fixture for devotees of cold, abrasive sound.

Chicago thrash act Sedition formed in 2018 with a straightforward mission: write punishing, fast, and aggressive metal in the mold of the genre's classic period. Operating out of a city with a long history of heavy underground activity, they channel the crossover energy and riff-forward intensity that made thrash a movement rather than just a style.

Named after the haunting bone church outside Prague, Kansas City's Sedlec Ossuary have been building elaborate death metal architecture since 2015, working at the intersection of progressive structure and technical execution. Their music rewards patience as much as aggression, layering complex rhythms and shifting tempos over death metal foundations that never lose their brutality.

Detroit's Seduce bring a heavy and power metal sensibility to a city with deep roots in hard-driving rock and metal, coupling soaring vocal delivery with thick, riff-driven arrangements. Formed in 2021, they occupy the classic end of the American metal tradition, drawing energy from both the melodic ambitions of power metal and the raw force of traditional heavy metal.