Sikaryus practice black metal from Bochum, drawing their name from the ancient Jewish dagger-wielding assassins (Sicarii). Active since 2017, they bring historical menace to the Ruhr Valley's black metal scene.

Sikiokuolema (Finnish for "Stillbirth") grind through goregrind from Jyvaskyla, channeling the subgenre's most disturbing themes. Formed in 2022, they bring obstetric horror to the central Finnish underground.

Silberbach ("Silver Stream") channel black metal from the tiny Franconian village of Sachsen bei Ansbach, their pastoral German name contrasting with the genre's harsh intensity. Active since 2014, they bring rural Bavarian atmosphere to their atmospheric output.

Silence Equals Death play thrash and groove metal from the Barcelona suburbs of Rubi and Sant Cugat del Valles, combining aggressive velocity with rhythmic power. Active since 2011, their name channels political urgency through heavy metal.

Silence of the Abyss brings progressive death/groove metal from Bastia, the principal city of northern Corsica, active since 2018. Operating from this Mediterranean island gives their heavy sound an uncommon geographic origin within European extreme metal.

One-man cinematic folk black metal project from Leuven, launched in 2024, whose releases "Towards the Chimaera" and "Where Our Coils Collide" blend atmospheric black metal with folk instrumentation and cinematic grandeur. The project's name references sacred groves of Celtic religion, reflecting a deep engagement with pagan mythology.

Silence the Yearning blend melodic death metal with gothic metal from the Spanish underground, combining aggressive extremity with dark romantic longing. Active since 2015, they bring emotional depth to their Iberian melodic extreme sound.

Silenced deliver thrash metal from Halle an der Saale, channeling aggressive velocity from Saxony-Anhalt's largest city. Active since 2009, they've been a fixture of the eastern German thrash scene for over a decade.

Silench Crew deliver thrash and heavy metal from the Castilian city of Burgos, channeling aggressive energy from the historical heart of Spain. Formed in 2021, they bring Gothic-quarter intensity to the Castilian thrash scene.