Nocthun describes their music as "apocalyptic antifascist metal," channeling blackened death metal into explicitly political and confrontational themes. Their debut full-length "Rest in Flames" establishes the project with tracks like "In the Uncanny Valley of Death" and "Volcanic Hellfire," pairing blast-driven aggression with ideological conviction.

Noctívago is a solitary black metal project that drifts between crushing doom weight and spectral ambient drift, releasing a sequence of self-titled volumes — I through V — through the Terror Noturno label, each pressed in severely limited cassette runs. The music pulls influence from post-punk as much as orthodox black metal, weaving slow, suffocating riffs with passages that dissolve into murk and static.

NoxEternum is a black/death metal band from Alto Paraná, Paraguay, active from 2022 until their split-up. In their brief existence they were prolific, releasing two full-length albums — "Portal to NoxEternum" and "The Black Window of the Mind" — along with two singles, all in 2022.

Nuclear Brains blend black, thrash, and death metal in a deliberately lo-fi package, with the four-piece openly acknowledging on their 2015 EP First! that limited resources shaped the recording — funded through gig ticket sales and made with more energy than budget. The lineup of guitarists and vocalists Cão Westphalen and Rafael Decarli alongside bassist Ivan Borba and drummer Doug Hanauer gives the band a dual-vocal abrasiveness that suits the genre-crossing aggression.

One of the more savage relics of the late-1980s underground, Nuctemeron played a brutal and primitive blackened noise-grind that positioned them alongside other uncompromising Brazilian extreme acts of the era. Their 1990 demo Industrial Pollution and the captured chaos of the 1991 live tape Last Massacre represent the entirety of their output, later compiled on the FOAD Records release Posers Mutilation 1989–1991.