Sinistro formed in Lisbon, Portugal in 2011, initially releasing an instrumental debut before integrating the distinctive voice of vocalist Patrícia Andrade, which became the defining element of the band's atmospheric doom and post-metal sound. After signing to Season of Mist, the band released Semente (2016) and Sangue Cássia (2018), earning praise from peers including Paradise Lost and Cult of Luna and appearances at Roadburn Festival. Their fourth full-length Vértice arrived in 2024 via Alma Mater Records. Sinistro are widely considered one of Portugal's most important metal exports, with Andrade's vocal presence lifting their work beyond genre convention.

Sink evolved from drone/black metal into dark ambient and darkwave territory, tracing a journey from metallic extremity toward atmospheric electronic darkness. Active since 2018, their shifting identity reflects an artist unwilling to remain static.

SinKing deliver groove metal from the southern Finnish town of Turenki, channeling rhythmic heaviness as they sink into heavy grooves. Formed in 2020, they bring sin-laden rhythmic power to the Kanta-Hame scene.

Reykjavik's Sinmara are among Iceland's most respected black metal acts, crafting meticulously composed extremity since 2014. Their work within the broader Icelandic black metal collective has yielded some of the scene's most acclaimed releases.

Sinmas evolved from hardcore/punk origins into thrash and groove metal from Bilbao, tracing the natural bridge between punk energy and metal aggression. Active since 2020, they bring Basque crossover spirit to the Spanish thrash scene.

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Sinnemia blend groove and gothic metal with rock elements from Brno, creating a darkly melodic sound that balances heaviness with accessibility. Their Moravian capital base gives them access to one of the Czech Republic's most vibrant music scenes.

Sinner Rage play heavy metal and hard rock from the Basque capital of Vitoria-Gasteiz, channeling classic metal energy with Basque intensity. Formed in 2024, they bring fresh traditional metal to the Alava province.

Sered's Sinners Moon pair symphonic and power metal from the small Trnava-region town since 2017. Their lunar-transgression name channels the celestial light illuminating sin into orchestral compositions from western Slovakia.