Liberteer is the solo grindcore project of Santa Cruz, California musician Matthew Widener, better known for his work in Exhumed and Cretin, formed around 2011. Their sole album Better to Die on Your Feet Than Live on Your Knees (2012, Relapse Records) is a dense political statement rooted in anarchist philosophy, notable for grafting brass instruments, banjo, and mandolin onto a blasting death-grind foundation. The project remains a curio of the early 2010s extreme metal underground for its ideological commitment and unusual instrumentation.

San Diego death metal outfit Lord Demise have been crafting unrelenting, riff-forward brutality since 2018, with the sun-scorched aggression of Southern California's underground.

Hayward's Lychdom craft melodic death metal anchored in traditional heavy metal songcraft, keeping hooks within reach even as the tempos accelerate and the riffs grow more complex. Active since 2016, they're one of the Bay Area underground's better-kept secrets.

Lycus formed in Oakland, California in 2008, operating in the most extreme end of the funeral doom spectrum while incorporating textures from black metal, noise, and shoegaze. Their debut LP Tempest (2013) featured three massive tracks ranging from ten to twenty minutes, drawing comparisons to Mournful Congregation and Asunder. The follow-up Chasms (2016), recorded at Atomic Garden Studios with producer Jack Shirley, distilled their approach into four immense compositions of deep, deliberate gloom.

Southern California's Lysis have been merging the crawl of doom with death metal's rot since 2008, crafting music from the Inland Empire that sounds like decomposition set to a slow, inevitable tempo. Grief rendered in distortion.

Visalia's Maggot Colony have been fusing death metal brutality with grindcore brevity since 2006, delivering short blasts of California-grown filth with relentless energy. Two decades in, their approach remains as single-minded and caustic as ever.

Los Angeles' Manipulated Mutilation have occupied the brutal end of the death metal spectrum since 2009, blending slam's bone-snapping groove with the surgical extremity of technical deathcore. The result is visceral, precise, and entirely uncompromising.

Named after a viral hemorrhagic fever, Los Angeles' Marburg bring clinical precision to their hybrid of technical death metal and grindcore. Formed in 2016, the band strips both genres down to their most potent elements — speed, density, and surgical brutality.

Matt Harvey is a California-based musician who founded the death metal and grindcore band Exhumed in 1990 at the age of fifteen, guiding the band through more than three decades and multiple stylistic evolutions rooted in the carnage-obsessed tradition of Carcass and Repulsion. Beyond Exhumed, Harvey co-founded Gruesome, a project explicitly designed to pay homage to Death's early albums Scream Bloody Gore and Leprosy, along with additional projects including Pounder and Left to Die. His prolific involvement across multiple death metal acts has made him one of the central figures in West Coast American extreme metal.