Tro is a heavy metal band from Barcelona, Spain, formed in 2016. They play traditional heavy metal from the Catalan capital.

Trocotombix is a grindcore band from Valencia, Spain, active since 2008. They deliver chaotic, blast-beat-driven grindcore from the Valencian Community.

Trogne emerge from Fribourg, Switzerland under the Latin motto "Ad Majorem Ebrietatis Gloriam" — to the greater glory of intoxication — releasing albums "Ethyloéréthisme" and "Ethyloccultisme" that merge black metal darkness with doom metal weight. Their alcohol-soaked thematic concept and crushing riffs place them firmly in the lineage of irreverent, hedonistic extreme metal.

Trold is a folk metal band from Randers, Denmark, formed in 2021. Their name meaning "troll" in Danish, they weave Nordic folk traditions into heavy metal.

Troll Spell is a stoner/sludge metal band from Mirano near Venice, formed in 2025. Their enchanted name adds mythological charm to the heavy, fuzz-laden sludge they deliver from the Venetian mainland.

Trollcave is a funeral doom/death metal band from Barcelona, Spain, formed in 2022. They deliver glacially paced, cavernous doom from the Catalan underground.

Trollech are pioneering figures in Czech pagan black metal, active from Pilsen since 1999 and among the first Czech bands to fuse black metal ferocity with Slavic pagan themes and folk elements. Over two and a half decades, they have built an extensive discography celebrating pre-Christian Bohemian spirituality and the natural world.

Norwegian party-metal collective Trollfest have spent two decades crafting a gleefully chaotic fusion of folk metal, speed metal, and Balkan music performed with an infectious enthusiasm that makes their live shows feel like a medieval tavern brawl set to blast beats. Their use of invented languages, absurdist humor, and traditional instruments like accordion and banjo alongside extreme metal ferocity creates a sound utterly unlike anything else in the genre. Albums like 'Helluva' and 'Flamingo Overlord' demonstrate that Trollfest take their musicianship seriously even when their subject matter involves trolls, beer, and sheer pandemonium.

Trollfjell from Jesenice play pagan black metal that channels Norse and Slavic mythology through fierce, nature-worshipping compositions since 2020. Despite their Scandinavian-sounding name, they are firmly rooted in the Czech pagan metal tradition established by bands like Trollech.