Spiter is a Philadelphia black metal and punk band formed in 2021, blending the raw antagonism of black metal with the stripped-down aggression of punk in a style reminiscent of black n' roll and black punk hybrids.

Splat is a technical thrash metal band from Lemoyne, Pennsylvania, formed in 2019, playing fast and intricate thrash with an emphasis on complex riffing and tight musicianship.

Harrisburg, Pennsylvania's Squalor have played death metal and grindcore since 2010, merging the brutality of both genres into a relentlessly abrasive sound rooted in the mid-Atlantic underground.

Stab! Stab! Stab! is a metalcore band from Pittsburgh, Pennsylvania, active since 2003, bringing an aggressive, no-frills approach to the genre shaped by the city's hardcore underground.

Stalagmite is a Pittsburgh, Pennsylvania black metal band formed in 2023, carving out a place in the city's active underground metal scene with raw, atmospheric black metal.

Stalemate of Wills is a Pittsburgh, Pennsylvania sludge, stoner, and doom metal band formed in 2022, conjuring slow, hazy heaviness from the crossroads of sludge's abrasion and stoner doom's hypnotic weight.

Star Viper is a Pittsburgh, Pennsylvania blackened heavy and thrash metal band formed in 2022, infusing the cold aggression of black metal into a framework of classic heavy and thrash metal riffing.

Philadelphia avant-garde metalcore veterans with roots going back to the late 1980s, Starkweather evolved from raw hardcore-influenced metalcore into one of the most unconventional and challenging acts in extreme American metal, known for dissonant compositions and uncompromising artistic vision.

Staticlone formed in Philadelphia, Pennsylvania in 2021, assembled primarily by George Hirsch and Dave Walling of Blacklisted alongside Jeff Ziga of Affirmative Action Jackson and Armalite. The band plays crust-inflected hardcore punk with d-beat rhythms, heavy metal riffing, and the kind of earned severity associated with acts like Disfear and Wolfbrigade. After releasing a 2021 demo, Staticlone signed to Relapse Records and issued their debut full-length Better Living Through Static Vision in March 2025. The project channels the experience of musicians who spent decades in hardcore into a deliberate and uncompromising record.