Action were a metalcore and death metal band from Teplice, Czech Republic, active from 1998 to 2013, who began in the New York hardcore tradition of Madball and Ryker's before incorporating increasingly heavy death metal riffs and breakdowns. By their final years, their sound had evolved into a toughened moshcore and deathcore hybrid comparable to Hatebreed and All Out War.

Action Jackson are a death metal, melodic death metal, and metalcore band from Berlin, Germany, active since 2012, who blend multiple strains of modern extreme metal. Their sound navigates the intersection of death metal aggression, melodic precision, and metalcore dynamics from the heart of Germany's capital.

Activated thrashes from Kyiv since 2021. Their energized name drives compositions of catalyzed aggression from the Ukrainian capital, bringing fresh thrash energy to a nation under immense pressure.

Actokill delivers thrash metal from Espoo, Helsinki's western neighbor and Finland's second-largest city, since 2020. Their assassin-themed name matches the lethal precision of their thrash attack.

Acts of Brutality merges groove metal with metalcore from the Wiltshire town of Chippenham since 2012, delivering exactly what their name promises. Over a decade of punishing compositions reflect sustained commitment within the West Country's metal scene.

Acts of Tranquillity creates symphonic and power metal from Östersund in Jämtland since 2022. Their peaceful-action name drives orchestrally enhanced compositions from this northern Swedish winter-sports capital.

Acts of Vengeance brings heavy metal and thrash from Hertfordshire since 2024, their retaliatory name capturing the aggressive energy of their dual-genre assault. The project represents the newest wave of traditional metal from the Home Counties.

Actual plays heavy metal from Prievidza in the Upper Nitra since 2021. Their direct, unpretentious name drives classic heavy metal from this central Slovak mining-district city.

Lamia's Actus Septem merge black and doom metal into ritualistic compositions steeped in occult atmosphere and funereal pacing. Since 2020, the project has explored the darker recesses of the Greek metal underground with a contemplative, almost liturgical approach.