Overdose Nuclear coined the term "Metal do Mangue" to describe their death/thrash sound rooted in the coastal town of Ubatuba, pairing heavy riffing with socially conscious lyrics about environmental destruction and political corruption. Their 2023 album Metal do Mangue features guest appearances from Mayara Puertas of Torture Squad and Jairo Vaz Neto of Chaos Synopsis, alongside a cover of Raul Seixas's "Cowboy Fora da Lei," cementing the band's distinct identity within the Brazilian extreme metal scene.

Overlook are a Curitiba-based thrash metal outfit built around guitarist Matheus Savi, vocalist and bassist Ricardo Brito, and drummer Gabriel Cordeiro, maintaining the stripped-down aggression typical of the Brazilian underground scene. Their EP Redrum established them as a straightforward thrash act with no frills, channeling the direct energy of classic 1980s riff-driven metal.

Overnoise were a thrash metal band from Sorocaba active from 1990 through the early 2000s, featuring the sibling rhythm section of guitarist Carlos Navarro, guitarist Leandro Gamero, bassist Alex Navarro, and drummer Fernando Gamero alongside vocalist Daniel V. Filho. They released a self-titled demo in 2001 before splitting up, leaving a small but documented mark on the São Paulo state underground thrash scene.

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.

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.

Paganos are a thrash metal band from Buenos Aires whose debut album Infierno Real was recorded between June 2006 and March 2007 at Kirkincho Records in Morón. Their second album Nos Vemos en el Infierno followed in 2010 via Pacheco Records, and the band appeared on tribute compilations honoring Argentine heavyweights Hermética (2002) and V8 (2008).

Pale Grey Sky are a death/thrash metal band from Zárate, Argentina, formed in 2022 with members Nacho Flores (vocals), Facundo Peralta (guitar/vocals), Manuel Flores Taborda (bass), and Lorenzo Piagna (drums). They released their debut album Libres de toda Esperanza in June 2022, recorded and mixed at Nipper Studio in Campana, Argentina.

Paradoxo carry on the northeast Brazilian tradition of raw, street-level crossover thrash, delivering hoarse vocals over fizzing drums and fast, dirt-coated guitar riffs that reach back to the sleazy underground of the 1980s. Their Sociedade EP (2018) established their sound with tracks like "Invasão" and "Massa de Manobra," packing nineteen minutes of manic thrash urgency.

Parkcrest were a thrash metal band from the Santiago area who formed in 2011 and split up in 2023, recording their material at Lion's Roar Studio in Peñaflor. They released two full-lengths: Hallucinative Minds in 2017 and ...And That Blue Will Turn to Red in 2019, both praised for capturing an authentic 1980s thrash aesthetic without simply recycling riffs.