Spontaneous Combustion is a brutal slamming death metal band from Río Grande, Tierra del Fuego — one of the southernmost cities in the world — making them one of the most geographically isolated extreme metal acts in Argentina. The band released the EP Ignición, which is catalogued on Encyclopaedia Metallum and distributed through Grinder Cirujano Records.

Stained Glory was a thrash/heavy metal band from Bogotá, Colombia, formed in 2008 and active as an independent act. They released the Machinery EP in 2011 and the Hate Corrodes EP in 2016 before splitting up.

Melodic heavy metal band from Vila Velha, Espírito Santo, active from late 2002 until splitting up, featuring vocalist Marco Antônio and guitarist Tiago Kyrius. The band took their name from the Rainbow classic and recorded the demo The Gaia's Calling in early 2004, earning local recognition and opening shows for Brazilian acts including Shaman before eventually going inactive.

Steel Back are a heavy/speed metal band from Panquehue, in Chile's Valparaíso region, who released their debut demo Después de Muerto in 2018. Their 2022 debut full-length El Poder de la Bestia, recorded and mastered at LV Studio, was followed in 2023 by the concept album Alligators, which continues the story of the character introduced on the first record.

Heavy metal band from Franca, São Paulo, formed in 2019 by guitarist Alex Livás alongside vocalist Bruno Coimbra, bassist Rafael Kempp, and drummer Christiano de Paula. Their self-titled debut album, a ten-track record released on September 27, 2023 through Alone Records, covers themes of war, battles, and apocalypse.

Traditional heavy metal band from Rio de Janeiro formed in 2013, fronted by vocalist Terry Painkiller (also of Facing Fear), who released the debut recording Howling Like A Steel Wölf in 2012 before the band went on hiatus. Steel Wölf returned to live activity by 2018, performing at the Metal sem Fronteiras festival in Rio de Janeiro in August of that year.

Stellivm are a progressive metal band from Santiago, Chile, playing entirely instrumental heavy music. Their debut full-length Octava Poëtica was released in April 2023, featuring eleven tracks with Latin-inflected titles drawn from astronomy and classical mythology.

Stenches Beyond Repulsive is a goregrind band from Bogotá, Colombia, formed in 2019 as a continuation of Mortuus Neurons, which had been active from 2013 to 2018. The band has released two full-lengths — Horrible Cannibal Tales (2020) and The Gods of Bloody Spatter (2024) — along with numerous splits and a live album.

Stonegrunger is a heavy/groove metal band from San Carlos de Bariloche in Argentine Patagonia, known for a prolific run of numerically titled EPs: UNO (2017), DÚO (2019), TRY (2021), QAT (2023), and KIN (2024). All releases are self-published through their Bandcamp page, and the band sings in Spanish.