Sunblaze craft progressive metal from Kaiserslautern, building intricate compositions illuminated by the solar energy their name suggests. Active since 2015, they bring blazing ambition to the Rhineland-Palatinate progressive scene.

Superhead craft progressive metal and fusion from Aarhus, pushing beyond conventional metal boundaries into experimental territory. Formed in 2021, they bring cerebral, genre-defying ambition to Denmark's second city.

Superlost craft progressive metal from the Finnish underground, building intricate compositions that explore themes of being completely, utterly lost. Emerging in 2025, they bring disoriented ambition to the Finnish progressive scene.

Surtalog craft progressive and pagan black metal from Cologne, blending cerebral composition with pre-Christian Nordic mythology. Formed in 2019, they bring the fire of Surtr's Norse apocalypse to the Rhineland's experimental black metal scene.

Surunaamio (Finnish for "Mask of Sorrow") craft progressive rock and metal from Helsinki, building intricate compositions that explore the theatrical nature of grief. Emerging in 2025, they bring masked sorrow to the Finnish capital's progressive scene.

Suvilehto craft melodic progressive death metal from the northern Finnish city of Oulu, building elaborate compositions that combine technical ambition with melodic depth. Active since 2013, they bring summer-grove serenity to the Ostrobothnia extreme scene.

Swarm blend progressive and technical death metal with deathcore elements from Ceske Budejovice, creating a sophisticated yet punishing sound. Their South Bohemian base proves that technical extremity thrives beyond the major Czech metal hubs.

Stockholm's Sweven explore progressive death metal from the Swedish capital since 2020. Named for an archaic English word meaning "dream" or "vision," their literary reference channels prophetic reverie into compositions of technically ambitious, boundary-pushing extremity.

Italian avant-garde metal act SYK formed in 2013 when guitarist Stefano Ferrian and Federico De Bernardi di Valserra recruited vocalist Dalila Kayros following the dissolution of their previous project. Their debut Atoma (2014) attracted Philip H. Anselmo, who signed them to Housecore Records and produced their second album I-Optikon (2016); subsequent releases Pyramiden (2022) and eartHFlesh, on Season of Mist, expanded the band's eclectic fusion of djent, progressive metal, death metal, and extreme experimentation. Kayros' harsh female vocals are central to the band's identity.