Athens' Acid Mammoth are one of Greece's premier doom-stoner acts, crushing listeners under mammoth-sized fuzz riffs and Black Sabbath-worshipping heaviness on albums like 'Under Acid Hoof' and 'Supersonic Megafauna Collision' for Heavy Psych Sounds. Founded by father-and-son guitarists Chris Babalis Sr. and Jr., the band's family bond fuels a uniquely cohesive and devastating wall of sound.

Acid Mantra combines heavy and doom metal from Campagnola Emilia in the Reggio Emilia province since 2021. Their name suggests a ritualistic repetition of corrosive riffs, which their Emilian compositions deliver with hypnotic deliberation.

Acid Ocean has navigated stoner and sludge metal waters from Milan since 2012, their evocative name suggesting vast expanses of corrosive heaviness. Their Lombard-bred sound favors the slow, saturated approach that defines the stoner-sludge intersection.

Acid Phase plays heavy metal from Lubań in Lower Silesia, with origins dating remarkably to 1964 — making them one of the oldest metal-associated acts in Poland. Their extraordinary longevity from this small town near the Czech and German borders is unmatched in the Polish metal landscape.

Acid Pope delivers power metal from the Nottinghamshire town of Mansfield since 2021, their provocative papal-psychedelic name adding irreverent humor to their anthemic compositions. Their East Midlands origins feed a distinctly working-class approach to epic metal.

Acid Reflux channels stoner and doom metal from Rotterdam since 2019. Their gastroenterological name captures the burning, rising discomfort of their heavy, fuzz-laden sound from the Netherlands' industrial port city.

Acid Reign is one of the "Big Four" of British thrash metal alongside Onslaught, Sabbat, and Xentrix, originally active from 1985 to 1991 in Harrogate before rebooting in 2015 under frontman Howard "H" Smith. Their albums "The Fear," "Obnoxious," and "The Age of Entitlement" document Yorkshire thrash at its finest, with their new album "Daze of the Week" set for 2026.

Acid Revenant merges black and thrash metal from Florence since 2014, pairing the raw velocity of thrash with black metal's tonal hostility. Their spectral-chemical name captures the ghostly aggression that defines their Tuscan approach.

Acid Row are a stoner rock trio from Pilsen, Czech Republic, formed in 2012, who pair the fuzzed-out heaviness of doom and stoner metal with punk attitude, psychedelic detours, and grunge-inflected noise. Their third full-length, "Poisoned Mind," arrived in March 2024, backed by a music video for the single "The Emperor" that emphasizes their blunt, groove-driven approach.