Parte de Nada is a psychedelic stoner/doom metal band from Córdoba, Argentina, built around the duo of Moco Piovano (guitars, bass, vocals) and Luca Frizza (drums). Their nine-track debut album Atacan Los Monstruos was released on March 14, 2023, recorded at Gran Rosa studio and a mobile studio between 2020 and 2021, with Frizza handling mixing and mastering.

Parth Gallen was a power and speed metal band from Natal active from 2001 to 2005, drawing on fantasy worlds drawn from video games, anime, and epic fiction — references to universes like World of Warcraft and Castlevania ran through their early material. In 2024 the surviving members issued Burning Swans, a collection built from tapes recorded at a 2017 reunion session featuring vocalist Davison Pegado, guitarists Christophe Freire and Roberto Phrankson, drummer T-Rash, and bassist André Rocha.

Assembled from veterans of other extreme music acts in Euclides da Cunha, Parthak built their sound around intricate melodic arrangements grafted onto a death metal foundation — early material leaned toward progressive complexity before the band settled into more streamlined melodic death territory. Their 2008 album Red Sorrow, featuring vocalist Humberto Amorim, guitarist Ítalo Rocha, bassist Júnior Moreira, and drummer Neilton Filho, remains their best-documented statement.

Essentially a one-man grindcore machine, PartyGrind is the solo project of Igor Goularth, who handles all vocals, guitars, bass, and programming out of his Dead Icon Productions studio in Rio de Janeiro. Since launching in 2019 Goularth has released a relentless stream of politically charged short-form brutality — including the early 2020 release COVID-19 — with lyrics in Portuguese that dissect Brazilian social and political dysfunction through blasts of sub-two-minute savagery.

Pasco 637 takes their name from a specific street address in Ramos Mejía, a suburb in the western belt of Greater Buenos Aires — the house of a woman named Nely 'Tata' Bruno, which served as an unofficial rehearsal sanctuary for local rock and metal musicians across multiple generations, dating back as far as the mid-1960s when bands like Los Grillos and Semilla de este Tiempo gathered there, the latter including musicians who would later surface in influential Argentine acts. By naming themselves after this address, Pasco 637 make a statement about continuity and belonging, locating themselves within a lineage of suburban Buenos Aires rock culture that fed the heavy metal scene throughout the 1980s and 1990s. The band's core formed in 1998 under the name Belzebuth, playing until 2004, and then regrouped and renamed in 2014 — meaning their actual musical relationship spans decades even if the Pasco 637 identity dates to their return. The current lineup includes Jerónimo Deiros on vocals, Demián Rugna and Juan Manuel Delgado on guitars, Ariel Simonetti on bass, and Walter Sosa on drums. Rugna is notable as an accomplished horror film director — his 2017 film 'Aterrados' (Terrified) earned widespread critical acclaim, winning Best Picture in the Horror category at Fantastic Fest, and his 2023 follow-up 'Cuando Acecha la Maldad' (When Evil Lurks) gained international distribution — and Pasco 637 has contributed music to several of his films, creating an unusual crossover between Argentina's underground metal world and its genre cinema scene. Their 2019 debut album 'Eterno en el Tiempo' blends material drawn from their 20-year catalog with newer compositions, reflecting the clear influences of Megadeth, Iron Maiden, and the Argentine groove metal tradition of Almafuerte. Reviewers noted the album's strong guitar interplay and Argentine-flavored rhythmic sensibility, with 'Catan' singled out as a highlight for its dynamic construction. Their sound distills the authentic suburban Buenos Aires heavy metal spirit — direct, groove-laden, and built to be played loud.

Paskinel is a heavy metal band from Avellaneda, Buenos Aires, anchored by Alex "La Parka" Paskinel on bass and backing vocals alongside vocalist Maikol Kramer, guitarist Nico Roa, and drummer Alejandro "Pelu" Rocha. The band recorded their self-titled debut album in 2019 at La Taberna Studio in Buenos Aires, with mastering handled at Charlone Studio.

Passional arrived from Belém's underground in 2023 with a short, prolific burst of doom-soaked death and thrash metal, releasing multiple records in rapid succession including I Cry... Tears of Blood and Sweet Revenge... To Kill You After My Death. Their material orbits crimes of passion, emotional devastation, and the violence that can emerge from betrayal, with extended compositions that sit at the bleaker, slower end of the death-doom spectrum.

Led by vocalist Mario Pastore alongside guitarist Rafael Gazal, Pastore deliver traditional heavy metal rooted in the classic European mold — melodic, anthemic, and built for the long song. Their catalog includes The Price for the Human Sins and the 2017 album Phoenix Rising, the latter released on the Japanese label Spiritual Beast, and the band has appeared on tribute compilations honoring both Helloween and Iron Maiden.

A fixture of the Belo Horizonte extreme metal underground, Pathologic Noise deal in gore-soaked brutal death metal with a relentless low-end attack and guttural vocal savagery. Their debut full-length "Sodomy and Delight on Flesh" (2003) on Cogumelo Records established their punishing formula, which they sharpened further on "Gore Aberration" (2014).