Nucleador came out of Sergipe playing uncompromising crossover thrash in the mold of the 1980s hardcore and thrash collision, recording their first EP within six months of forming despite none of the members having prior experience in the genre. They've built a steady catalog since, including the 2014 EP United by the Toxic and the 2021 full-length Back From the Dead, earning a spot at São Paulo's Night of Living Thrashers festival early in their career.

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.

Nuclear Screams traffic in a dense blend of death, thrash, speed, and melodic death metal that leans heavily on aggression without abandoning hooks. Their debut EP A Path to Endless Days arrived in November 2021, and the full-length Human Frailties followed in 2025, both recorded in Minas Gerais and showcasing a band comfortable moving between brutal riffing and more atmospheric passages.

Nuclear Trauma is a solo crossover thrash project born during the pandemic, built around raw and unfiltered riffing with lyrical content focused entirely on warfare and armed conflict. Early recordings including the ISMO demo, Religious War, and Remains of War establish a stripped-down sound in the tradition of classic American crossover, with no frills and no concessions.

Não Inação is a crossover thrash trio from Mauá whose debut EP Saúde Mental Deteriorada packs five tracks of politically charged aggression into under eight minutes, drawing equally from São Paulo hardcore punk and classic thrash. Tracks like "Falta de Ar" and "Desespero" hit themes of mental deterioration and social pressure with the blunt economy the genre demands.

Némesis is a thrash metal band from Concepción, Chile, formed in 1998 with influences drawn from old-school thrash and death metal acts including Slayer, Kreator, and Malevolent Creation. The band released a self-titled album in January 2016, marking their continued presence in the Chilean thrash underground after more than two decades of activity.