Operating under the abbreviation N.Ó.I.A. — a Portuguese slang pun meaning dopey or paranoid — this São Paulo grindcore outfit delivered blasts of politically charged noise across a run of splits and compilations between 2012 and 2016. Their discography includes the debut Gritos de Horror, a split with Instinct of Suicide, an Agathocles cover, and the Correntes da Tirania split with Smelling Fétid Corpse.

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.

Optofobia is a grindcore band from Merida, Venezuela. Active since at least 2014, they have released a series of EPs including "Corporotocracia" (2014), "Existencia en decadencia" (2015), and "Hacia el matadero" (2019), as well as splits with international acts like Dalle Killers and Nastiness.

Organismos is a death metal/grindcore band from Medellín, Antioquia, Colombia, active since 2001. The band features members with roots in the Colombian underground scene, including a guitarist who previously played in pioneering Colombian acts Parabellum and Herpes. They have released three full-lengths — "Organismos" (2006), "Manejos Invisibles" (2011), and "Control del Miedo" (2017) — on labels including Me Saco un Ojo Records and Tribulación Productions.

Os Capial channel the interior São Paulo caipira culture into abrasive grindcore, with lyrics, imagery, and speech all rooted in the rural working-class world their name pays tribute to. Since their 2015 debut Nossa Grindroça Querida they have maintained a prolific pace, releasing titles like Grindiagem Deatherra (2016), Emboscada Caipira de Plasma (2017), and Chichá - Sterculea Foetida (2018), each one hammering the collision of regional identity and extreme noise.

Osculum Obscenum built their reputation on ferocious black metal shot through with grindcore aggression, with their 2003 album Body Hurting Art cited by Brazilian underground historians as one of the most significant extreme metal releases the country produced in that era, alongside landmarks like INRI and Wicca. They later returned with material including Engendrum and Avances de Muerte before eventually disbanding, leaving behind a catalog regarded as visceral and uncompromising even by the standards of the Satanic underground.

Pabllo Vittar with Guns is a blasting extreme metal project that collides black metal, death metal, and grindcore into an unapologetically confrontational package, flying the flag for LGBTQIA+ representation in the heaviest corners of the underground. Their 2023 debut EP announced them with six tracks of ferocious, deliberately lo-fi noise and a title that leaves no ambiguity about who they're playing for.

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.

Hailing from Macapá in the far north of the country, Peia Braba bring a chaotic and unpolished grindcore attack to a genre with deep roots in Brazil's underground. The band drew international underground attention with a 2015 split alongside Belgian grindcore legends Agathocles, recorded at Khaos Studio in their home city.