Anxiety Collapse burst onto the scene in 2023 from the Tolna County town of Tamási, merging thrash and death metal into a frenzied assault. Their name captures the psychological intensity that drives their music from this small southern Hungarian settlement.

Anxifer fuses black and death metal from Marseille since 2015, their anxiety-bearing name reflecting the unease at the core of their dual-genre extremity. Their Mediterranean port origins add an unlikely backdrop to their northern-European-influenced sound.

Minsk-based project blending depressive black metal, death metal, and doom, tagged on Bandcamp as DSBM and doom/death. Their 2018 release "Nothingness" consists of three elongated tracks—"No Thoughts," "No Pain," and "No Life"—built around themes of existential emptiness and self-erasure.

Anzv merges death and black metal from Porto since 2022. Their truncated, vowel-stripped name matches the compressed intensity of their dual-genre extremity from northern Portugal.

Aon is a death metal band from Copenhagen, Denmark, formed in 2019, contributing to the Danish capital's deep well of extreme metal. The band delivers death metal's characteristic brutality from one of Scandinavia's most active metal cities.

Aortic Rupture delivers death metal from Groningen as of 2025. Their cardiovascular-catastrophe name promises the sudden, fatal violence of their debut material from the university city of the northern Netherlands.

AoX fuses black and death metal from the Finnish underground since 2014, operating at the volatile intersection of extreme metal's two most aggressive subgenres. Their minimalist name matches the stripped-down intensity of their dual-genre assault.

Apa Simbetii merges black and death metal from Bucharest since 2013. Their Romanian name, referencing 'Saturday's water' — a folk tradition connected to commemorating the dead — grounds their extreme metal in Romanian folk belief.

Apallic Decay is a black and death metal band from the Katzweiler and Kaiserslautern area of Germany, formed in 2016, delivering a mixture of black and death metal with progressive influences that brings a versatile approach to the stage. Their releases include First Blood, the EP Return of the Unhallowed, and the full-length Realms of Tartaros, drawing thematic inspiration from Greek mythology and the underworld.