Astronomikon are a power/heavy metal band from Nicosia, Cyprus, formed in 2008, featuring several members drawn from the Cypriot power metal institution Arrayan Path, including bassist Paris Lambrou and vocalist Nicholas Leptos. Their debut album, released on Pure Legend Records, is a concept record about the myth of Perseus and Medusa, blending American and European power metal styles with traditional heavy metal foundations.

Astucia delivers heavy metal from Madrid since 2024, bringing sharp-witted energy to the capital's traditional metal scene. Their name, meaning "cunning" in Spanish, hints at a band with something clever up their sleeve.

At F1rst channels melodic heavy, groove metal, and metalcore from Saint Petersburg since 2016. Their numerically augmented name — 'at first' with a formula-one flair — drives a decade of genre-blending from the northern capital.

Atalaya crafts heavy metal from the ancient port city of Cádiz since 2018, standing as a watchtower of traditional metal in Andalusia's southernmost reaches. Named for the lookout towers that dot the Cádiz coastline, their sound surveys the full horizon of classic heavy metal.

Ataria plays heavy metal and hard rock from Zalău in Sălaj County since 1997. Nearly three decades from this northwestern Transylvanian town have produced one of the region's most enduring traditional metal acts.

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.