Acid Satan is a five-piece metal and punk fusion band from La Rioja, Argentina, formed in early 2023, featuring Kevin Satan on vocals and guitar, Mati Argonaut on guitar, Neri Blackmass on keys and vocals, Pablo Fat Pipe on bass, and Pablo Kdk on drums. Their debut EP "Doomed Junkies," released September 28, 2023 and recorded in the Matadero neighborhood of La Rioja, contains six tracks exploring themes of witchcraft, paranoia, and dark psychedelia. The band fuses crossover thrash energy with stoner heaviness and lysergic textures uncommon in Argentina's northwest.

Age Nor Defields is a crossover thrash quintet from Mongaguá, on the São Paulo state coast of Brazil, fusing thrash metal with hardcore punk energy and grindcore experimentation. Their album "Mongahell" is a 25-minute barrage of politically charged, anti-fascist material delivered in Portuguese, mixing protest and class consciousness with acid humor and absurdist provocation. Reviewers have noted their earnest, exuberant approach and the Zappa-esque tendency to wrap pointed social commentary in comedic delivery.

Alavena are a crossover metal band from the Santiago area of Chile, formed in 2013, who blend thrash, speed, death metal, and hardcore influences. Their debut album It Started Here was released on February 1, 2013 through Australis Records, comprising 12 tracks that include both Spanish- and English-language songs such as "Beer Money," "El Terrible," and "Muerto en Dolor." The record is one of the early entries in Chile's crossover thrash scene of that era.

Alerta Vermelho was a crossover/thrash band from Belo Horizonte, Brazil, formed by veteran underground musicians who swapped roles to channel raw punk and thrash energy. Their 2024 EP "Zero" — a six-track, 15-minute release on Metalpunk Overkill Records — fused punk aggression with metallic weight and was recorded entirely in Portuguese, arriving on limited-edition orange cassette. The band drew from a lineage of Belo Horizonte crossover acts and influences ranging from Misfits and Hüsker Dü to Brazilian punk outfits like Replicantes and Plebe Rude before splitting up shortly after the release.

Anencefalo were a crossover thrash band from Santiago, Chile, active across several periods between 2004 and 2023, who evolved from punk-inflected death metal into a harder-edged thrash and crossover style. Their discography includes the albums "Odio" (2009) and "Cefalotripsia" (2011), with lyrics addressing mental illness, death, and depersonalization throughout their career.

Anesthesia of Beer is a crossover thrash band from Campos dos Goytacazes, Rio de Janeiro, blending punk, hardcore, and extreme metal in the tradition of Brazilian crossover acts. Their discography includes the demo "Reign in Beer" (2009), the EP "The Lightning Broke My Bottle" (2012), the full-length "Altars of Drunkenness" (2017), and "My Terror Tapes" (2019), with lyrics spanning horror-film homage, beer-soaked party anthems, and sharp antifascist social criticism.

Thrash/crossover band from Campo Grande, Mato Grosso do Sul, formed around 2007–2008, delivering politically charged and pit-ready material that draws equally from classic thrash metal and hardcore punk. Their album "Thrashback from Hell" captures their stripped-down, aggressive approach, placing them squarely in the tradition of Brazilian crossover bands that prioritize speed, aggression, and social commentary.

Atrito Urbano is a crossover thrash band from Natal, Rio Grande do Norte, formed around 2012–2013. Their Portuguese-language lyrics tackle social and political themes, and their discography includes the EP "Aprendiz de Escravo" (2014), the split "Infecção Urbana" with Infected, and the album "Praga Disfarçada" (2016), all self-released through independent channels.

Atropelo is a crossover thrash band from Mauá, in Greater São Paulo, whose influences include Brazilian hardcore/thrash veterans Ratos de Porão, D.F.C., and Cólera. The four-piece released their debut album "Mentira Acima de Tudo, Ilusão Acima Todos" in February 2025, recorded at Hells Pass studio in São Caetano do Sul, with lyrics in Portuguese addressing political and social grievances.