Sodomizing the Dead is a death/thrash and grindcore band from Lynwood, California, formed in 2014, channeling the abrasive energy of Southern California's extreme metal underground through a punishing crossover of brutality and speed.

Soilent Green is a New Orleans-based sludge, death metal, and grindcore band with roots going back to the early 1990s, widely regarded as one of the most distinctive acts to emerge from the Crescent City's extreme music underground, fusing the region's murky sludge aesthetic with grindcore brutality and experimental dissonance.

Sokushinbutsu is a grindcore, death metal, and crust punk band from Baltimore, Maryland, formed in 2013, named after the Japanese practice of self-mummification and channeling that extreme dedication into ferociously short, punishing compositions.

Sooper Spooki are a California black metal and goregrind project formed in 2020, merging the lo-fi atmospherics of raw black metal with the speed and grotesque imagery of grindcore in a deliberately irreverent package.

Sores for Days are a grindcore band from San Luis Obispo, California, formed in 2023, delivering the short, blasting, aggressive extremity the genre demands from the Central Coast's tight-knit underground scene.

Dallas blackened doom/sludge. Crushing, atmospheric heaviness.

Soul Waster is a Los Angeles band formed in 2019 that combines grindcore's ferocity with thrash metal's riff-driven aggression. Their crossover approach channels the raw speed and punk-inflected energy that defines the LA extreme underground.

Spasm is a thrash metal band from Lawrence, Massachusetts, formed in 2022, delivering straightforward aggressive thrash with the raw energy characteristic of the American underground scene.

Spazmic is a brutal death metal and goregrind band from El Paso, Texas, formed in 2008, operating at the extreme end of the underground with dense, abrasive recordings that blend the gore-splattered imagery and brutality of the genre's most uncompromising practitioners.