Fecal Devastation is a grindcore/death metal band from Itabira, Minas Gerais, Brazil, formed in 2004 and active across multiple periods. The band released the demo Síndrome de Diarréia and the full-length Depravação Moralista, and compiled their recordings on the retrospective The Rotten Collection — Fecal Devastation Discography 2004–2021 via Italian label Olivia Records. They have appeared on numerous international compilations addressing themes of social criticism and politics through a noise-saturated grind lens.

Finally Doomsday is a death/thrash and grindcore band from Porto Alegre, Rio Grande do Sul, formed in 2011. The band has released at least two recordings available through their Bandcamp page, including the split Healed for Today / Guess What? and the full-length Post Nuclear Armageddon. Their sound draws on the crossover traditions of extreme metal that have long been rooted in the Brazilian south.

FinDuMonde is a grindcore band from Buenos Aires, Argentina, active since 2006. They released their full-length album "Licantropía" as a CD in 2012, establishing them as a consistent presence in the Buenos Aires extreme underground scene.

Fiscales Muertos is a grindcore and crust punk band from Punta Alta, Argentina, formed by four members — Atrofius on vocals, Yoni on guitar, Chinok on bass, and Gomez on drums. The band released a self-titled EP available on their Bandcamp page, playing fast and raw noise-driven punk metal.

Foken Rotten Noise is an old school grindcore and death metal band from Santiago, Chile, with members drawn from various corners of the Chilean underground metal scene. The band released "Wastedlands" in 2013 through Thanatology Productions in a limited run of 500 CDs, followed by "The Finest Shit" in 2015, both albums channeling raw, anarchic energy with lyrical themes of anti-politics, anti-greed, and personal freedom.