Arkillator is a thrash metal band from Quito, Ecuador, originally formed in 2017 under the name Nightmare before adopting their current identity. The two-piece outfit released their debut EP Miseria Social in January 2026, a five-track effort that delivers straightforward thrash in the tradition of the genre's classic era. They operate independently and perform live in the Quito metal scene.

Armagedon is a heavy metal band from Florencio Varela, Buenos Aires, formed in 1991 and active across several decades with a catalog of socially charged material. They released their debut self-titled album through independent label Altar Records and followed it with "Ecología" in 1995, also appearing on the 1997 Argentine metal compilation "Nuevos Guerreros" released by Yugular Records.

Armoured Knight is a heavy/speed metal band from Peñaflor, Chile, active since 2012, whose lineup has centered on guitarist Cristian León alongside vocalist José Tapia and bassist Christopher Falk. They built their catalog across three EPs — "Prophecy of Tomorrow" (2013), "Ashes of Glory" (2017), and "The Sacred Flame" (2020) — before releasing their debut full-length "The Quest for the Sacred Melody" in October 2025 through German label Dying Victims Productions.

Aroma de Saturno is a doom, sludge, and stoner metal band from Blumenau, Santa Catarina, Brazil, formed in 2018. They occupy the slower, heavier end of the Brazilian metal underground, releasing their self-titled EP and the track Ponto Sem Retorno through Bandcamp. Blumenau's German-immigrant heritage and industrial past give the city an unusual cultural backdrop for the kind of heavy, atmospheric metal Aroma de Saturno pursues.

Arrastado is a stoner and doom metal project from Brasília, Brazil, formed in 2018 and built around home recordings under the name that translates roughly to "dragged" in Portuguese — apt for the slow, crushing tempos the band favors. Their releases include the album Isso Também Será Esquecido (This Too Shall Be Forgotten) and Hinos do Esquecimento, both available on Bandcamp and consistent with the heavy, fuzz-driven doom aesthetic. The project's DIY approach and introspective Portuguese titles reflect the broader character of Brazil's independent stoner-doom underground.

Arrebol is a progressive metal project from Santiago, Chile that has released material including the album "Simplicity of the Moment" (2023) and the EP "Four Leagues Away" (2024), the latter issued as a limited digipack of 66 copies. The project's output blends progressive metal with atmospheric and extreme metal influences.

Ars Moriendi is a Brazilian raw black metal project formed in 2018, operating within the underground tradition of lo-fi, abrasive black metal with themes centered on death and darkness. With minimal production and a stripped-back approach typical of the raw black metal ethos, the band channels the primitive intensity that has defined the Brazilian extreme metal underground.

Ars Notoria is a black metal band from Curitiba, Paraná, formed in 2017, with lyrical themes rooted in evil, darkness, and occultism. The band has released material through Mountain Distro/Prod. and draws on the cold, ritualistic atmosphere characteristic of the South Brazilian black metal underground.

Ars Tenebrae is a death/black metal band from Pouso Alegre, Minas Gerais, formed in 2019, playing anti-Christian extreme metal rooted in Satanic and misanthropic themes. The band operates as an independent underground act, combining the ferocity of Brazilian death metal with the cold savagery of black metal in the tradition of Minas Gerais extreme music.