Avant-garde black/death metal band from Plovdiv, Bulgaria—a city whose ancient Roman name, Trimontium, the band has adopted. Their 2021 demo, a four-track release, introduced their unconventional approach to extreme metal that blends black and death metal structures with more experimental and dissonant elements. Operating out of Bulgaria's second-largest city and former European Capital of Culture, they occupy a distinctive niche in the country's underground.

Tripalium from Limoges deliver deathcore named after the Roman instrument of torture that gave us the word 'travail' since 2014. A decade of compositions from the Limousin capital has channeled ancient punishment into modern breakdown-driven aggression.

Zaanstad's Triplesix began as a death metal act in 2020 before transitioning toward alternative metal, reflecting a stylistic evolution common among young Dutch bands navigating the space between extremity and accessibility. Their musical journey tracks from underground brutality toward broader sonic territory.

Triptykon was formed in Zürich, Switzerland in 2008 by Thomas Gabriel Fischer following the dissolution of Celtic Frost, his second celebrated band after Hellhammer. The project continues Fischer's exploration of extreme, gothic, and doom-inflected metal across two studio albums, Eparistera Daimones (2010) and Melana Chasmata (2014), both on Century Media. Dense, funereal, and deliberately paced, Triptykon represents Fischer's most introspective and stylistically unified work to date.

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

Trollheimen is a melodic death metal band from Csorna, Hungary, formed in 2019. They combine melodic guitar harmonies with death metal heaviness, drawing on Scandinavian melodeath traditions.

Trom from Neuchâtel fuse gothic metal's brooding atmosphere with the raw edge of deathrock, creating a dark, post-punk-inflected heaviness since 2018. Their sound occupies the shadowy intersection where Sisters of Mercy-style gloom meets distorted metal weight.

Tromort is a death metal band from Móstoles, Spain, formed in 2012. They play aggressive death metal from the Madrid metropolitan area.

Ghent black/death metal band active since 2004, operating as an independent act within the Flemish underground metal scene. The band blends the caustic extremity of black metal with the blunt heaviness of death metal in a style consistent with East Flanders's longstanding tradition of uncompromising extreme music. They have remained a persistent presence in Belgian underground circles for over two decades.