Atila from Castellón de la Plana is one of Spain's most venerable heavy and power metal acts, with roots stretching back to 1975 during the earliest days of the Spanish metal scene. Their decades-spanning career makes them contemporaries of the genre's founding acts.

Atlantean Kodex is an epic heavy and doom metal band from Vilseck in Bavaria, Germany, formed in 2006, widely regarded as one of the finest purveyors of epic heavy metal in the modern era. Their albums The Golden Bough, The White Goddess, and the 2022 opus The Course of Empire deliver lengthy, atmospheric compositions drawing on mythology, history, and classical elements, with tracks regularly exceeding eight to ten minutes in their cinematic scope.

Atlas Project brings heavy metal to Huelva, one of Andalusia's less heralded metal cities, since 2022. Their presence helps establish a metal foothold in Spain's southwestern corner, near the Portuguese border.

Atom Smasher is a heavy metal band from Remscheid in the Bergisches Land region of Germany, formed in 2020, delivering traditional heavy metal with the no-nonsense aggression their name implies. The band contributes to the enduring German heavy metal tradition from the industrial cities of North Rhine-Westphalia.

Atomic Dog plays heavy metal and hard rock from Oulu since 2013. From the northern Finnish city known for its air guitar championships, they channel canine ferocity through classic-leaning metal and rock.

Atomiko channels heavy metal energy from Barcelona since 2021, bringing explosive intensity to Catalonia's densely populated metal underground. Their atomic-themed approach suggests a band intent on maximum impact.

Newcastle's Atomkraft were pioneers of the NWOBHM and speed metal movements, delivering blistering heavy metal with a raw, uncompromising edge since reforming in 2015. Their name ('nuclear power' in German) reflects the explosive energy of their sound, which bridges the gap between classic heavy metal and early thrash.

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.

St. Helens' Attache revive the spirit of NWOBHM with twin guitar harmonies, galloping rhythms, and soaring vocal melodies that honour the movement's golden era. Since 2016, they've carried the torch for classic British heavy metal with authenticity and passion.