Overthrash from Bauru trace their roots back to the late 1980s, recording demos between 1988 and 1991 before going dormant and fully reforming in 2014. Their 2016 album Until Death blends three of those original demo tracks with newly recorded material, delivering honest old-school thrash in the tradition of Slayer, Exodus, and Sepultura, with current members P.A.D. on vocals and drums, Edmir and Marcão on guitars, and Biro on bass.

Overthrow were a death metal band from Buenos Aires active from 1991 until their split-up. They contributed tracks "Devil's Eyes" and "Conquer the Fear" to the Death Metal Advance CD (1994), and released a split with Uruguayan band Morbid Blood titled Devil's Eyes / World of Violence in 1995, their side recorded at Matadero studios.

Ovvercross is a heavy metal trio built around the guitar and vocals of Bruno Oliveira, whose muscular riff-driven attack sits somewhere between classic NWOBHM and the harder-edged German heavy metal tradition. Their 2021 debut full-length Stuttgart, 1943 — preceded by the EP So Survive — is a concept record centered on the true story of a nine-year-old boy sheltering from an Allied air raid over Stuttgart, turning historical trauma into anthemic, propulsive metal.

Oxida was a short-lived speed metal outfit from Buenos Aires that emerged in 2023 and dissolved not long after, leaving behind one of the more fleeting entries in Argentina's crowded underground metal registry. The band operated squarely in the tradition of old-school speed metal — the genre Argentina helped define in the 1980s through foundational acts like V8 and early Horcas — reaching back to the era when the boundaries between NWOBHM-inspired heavy metal and the proto-thrash aggression of Motorhead-worshipping bands had yet to fully crystallize. Buenos Aires has always harbored pockets of musicians committed to this unfashionably raw style, and Oxida planted their flag firmly in that territory. Their existence was brief enough that their catalog and full lineup details remain sparse in the public record, but their registration on Encyclopaedia Metallum confirms their presence in the capital's underground scene, where speed metal never truly went out of favor. Like many underground Argentine bands of their vintage, they likely played the circuit of small venues and metal fests that form the backbone of BA's non-commercial metal ecosystem — spaces where fidelity to genre tradition matters more than trends.

P.A.N.D.E.M.I.A. is a heavy and power metal band from Buenos Aires with roots stretching back to 1997, making them one of the longer-running acts in Argentina's traditional metal underground. The acronym-based name — a stylistic choice common in Argentine metal bands of that era who wanted to signal both seriousness and a kind of programmatic identity — reflects the band's commitment to a muscular, melodically driven heavy metal sound that draws on European power metal traditions while grounding itself in the distinctly Argentine approach to the genre pioneered by acts like Rata Blanca and Horcas. Buenos Aires has always been the nerve center of Argentine metal, and a band surviving from 1997 into the present has navigated through every shift the local scene has undergone: the economic crises of the early 2000s that devastated the music industry, the gradual recovery of live music venues through the 2010s, and the rise of streaming platforms that opened new avenues for underground bands to reach audiences beyond their immediate geography. Power metal as a form suits the Argentine sensibility particularly well — the genre's emphasis on soaring vocal melodies, technical guitar work, and epic themes maps neatly onto a scene that has always prized musicianship and emotional intensity over pure brutality. P.A.N.D.E.M.I.A. represents the resilient core of Buenos Aires's traditional metal scene: bands that have never chased trends, never broken up for commercial reasons, and continue to exist on the strength of genuine conviction and a loyal regional following.

P.E.O.R — the name standing for 'Por El Odio Reacción' (Reaction Through Hate) — are a crossover thrash and death metal band from Rosario, Argentina's second-largest city and a place with a long, scrappy DIY metal tradition. Formed in 2015 and built around the core of Gonzalo Gamboa (vocals and bass), Alejandro Laudanno (guitar), Lucas Manzón (guitar), and Gonzalo Acevedo (drums), the band hit their stride quickly with two substantial releases that showcase a command of the crossover thrash idiom laced with genuine death metal ferocity. Their 2015 debut, 'Por El Odio Reacción,' announced the band as a serious proposition: twelve tracks of accelerated, hardcore-influenced thrash with death metal overtones, clocking in around thirty minutes of barely controlled aggression. The album even includes a cover of Argentine rock legends SUMO, a nod to the broad musical literacy that underpins their sound. Their 2017 follow-up, 'Exterminio de Almas,' went deeper and darker — thirteen tracks recorded between June and July 2017 at 312 Estudio, with mixing and mastering by Juancho Huerta at Auditiva Records. The album opens with a Charles Bukowski quote and unfolds as a bleak social commentary, with lyrics addressing hypocrisy, institutional corruption, and systemic disillusionment — themes that resonate acutely in Argentina's turbulent political climate. The production has the controlled rawness ideal for the genre, and the dual-guitar attack from Laudanno and Manzón gives the songs a punishing, layered quality. Rosario's metal scene has always operated somewhat in the shadow of Buenos Aires but tends to breed tighter-knit, more fiercely independent bands as a result — P.E.O.R fit that mold precisely, building their audience through relentless live work in the region and connections with the broader Argentine thrash underground.

P.U.L.S.I.O.N is a heavy metal trio from Tres Lomas, a small town in the Buenos Aires province roughly 500 kilometers from the capital, and one of the more geographically remote entries in Argentina's underground metal scene. The band consists of Darío Gil on guitar and vocals, Jorge Detzel on bass, and César Adema on drums — three musicians who built their project from scratch in a town with no established metal infrastructure, recording their debut entirely on their own terms. Their first album, 'Utopías de Proyección,' released in December 2018, bears all the hallmarks of dedicated provincial heavy metal: honest riff-work, clean arrangements free of studio affectation, and a directness that comes from musicians who play because they genuinely love the form rather than for any careerist reason. The track 'Ecotopico' is among the standouts, showing a band that understands how to build dynamics within the classic heavy metal framework. Gil composed both the music and lyrics, giving the album a coherent personal vision rooted in the timeless Argentine heavy metal tradition that traces from V8 and Riff through Almafuerte and beyond. The band's use of social media and platforms like Bandcamp, SoundCloud, Instagram, and YouTube reflects how modern underground acts in Argentina's interior have compensated for their geographic isolation — building small but genuine audiences across the country without ever needing Buenos Aires as a gateway. P.U.L.S.I.O.N represents the stubborn, unglamorous face of Argentine heavy metal at the grassroots level, where the only prerequisites are three friends, some gear, and an unshakeable commitment to the music.

Originally formed in the late 1980s under the name Porrada Ultra Suicida, P.U.S. were among the earliest extreme metal acts to emerge from Brasília, drawing on Slayer, Celtic Frost, and early Sepultura to forge a raw death-thrash hybrid. They released the EP Third World in 1990 on Maggot Records and signed with the seminal Cogumelo Records for their self-titled debut LP, before a later reformation moved them deeper into pure death metal territory.

Paarthurnax channel orthodox black metal with themes rooted in Gnostic Luciferianism and sinister philosophy, delivering cold, uncompromising material in the tradition of the European underground. The band released their debut full-length Twelve Paths in September 2020, followed swiftly by contributions to the three-way split Where White Gods Rest alongside Inexistência and Além-Homem, released on Arte Ancestral Records the same year.