Atritas were a symphonic black metal band from Basel, Switzerland, active from 1997 to 2014, releasing their material through CCP Records. Their three studio albums — "Where Witches Burnt" (2004), "Medium Antigod" (2007), and "Celestial Decay" (2009) — combined Satanic and anti-Christian lyrical themes with the orchestral grandeur typical of the late-1990s Scandinavian symphonic black metal wave.

Atrium Noctis is a melodic black metal band from Cologne, Germany, formed in 2018, whose releases include Blackwards and the track Leviathan, delivering epic symphonic black metal with bombastic arrangements, profound dispatching, and atmospheric dark sections. The band brings cinematic grandeur to the Rhineland's extreme metal scene.

Atrocidade merges black and death metal from Lisbon since 2013. Their Portuguese name meaning 'atrocity' delivers exactly the horrors promised through over a decade of extreme metal from the capital.

Atrocious Command is a black/death metal band from Bruges, Belgium, operating in the underground extreme metal scene with a sound that draws equally from the aggression of death metal and the dark atmosphere of black metal. The band has released material through their Bandcamp page as an independent act.

Atrocity Exhibition merges thrash metal with crossover from Breitengüßbach in Upper Franconia since 2020. Named after both the Joy Division song and J.G. Ballard novel, they bring post-punk intellectual edge to their Bavarian thrash-crossover.

Atropas are a melodic death metal and metalcore band from Zürich, Switzerland, formed in 2011 by guitarists Mahmoud Kattan and Philipp Tudor. Signed worldwide to Wormholedeath Records, the band released their debut "Azrael" in 2013 followed by "Episodes of Solitude," "From Ashes," and "Black Gold," sharing stages with Nile, Skindred, and Dreamshade across their career.

Atrophia Red Sun has evolved from melodic doom and death metal into progressive death and industrial territory from Kraków since 1997. Nearly three decades of reinvention from Poland's intellectual capital have produced one of the country's most stylistically adventurous extreme metal projects.

Patras' Atrophic deliver muscular power metal infused with heavy metal grit, crafting anthemic songs built on driving rhythms and powerful vocals. Since 2009, they've been a reliable force in the Peloponnesian metal scene.

Atrophied creates death metal from Yekaterinburg since 2019. Their wasting-away name drives compositions of decay and dissolution from the Ural Mountains' largest city.