R.I.P. Soldier was a thrash metal band from Recife, Pernambuco, who recorded their sole album The True Soldiers Never Die between October 2009 and January 2010. The ten-track album — drawing influences from Bay Area thrash and Sepultura's Beneath the Remains era — was released in 2014 through GS Productions in a limited edition of 100 digipak CDs.

Rabujos is a grindcore band from Recife, Pernambuco, founded in 1994, making them one of the longest-running acts in the Brazilian grindcore underground. Their catalog includes the 2004 CD Contra Tudo e Contra Todos, the 2015 album Quatro Mil Corpos on Mold Dominion, and the 2017 album Desconforto, alongside numerous splits, including the 2007 five-way split Sinfonia da Desgraça.

Rache is a Brazilian black/death metal project formed in 2017, operating under the Acta Non Verba Rex label. Their 2019 demo Vril's Soldiers was later compiled alongside a 2020 rehearsal recording on the 2021 release Teutonic Soldiers of the Vril.

Radamathys is a black metal band from Ceilândia, in Brazil's Distrito Federal, formed in 2023. Their self-titled debut release, which appeared on Bandcamp in 2023, includes the track "A semente do mal" and draws on vampiric and occult themes.

Radiação Bestial is a speed/thrash/black metal band from Recife, active since at least 2011, with a lineup of vocalist Dominatorem ex inferi, guitarists Hellunatic and Bestial Atrocity, bassist Thiago Xaruto, and drummer Leandro Cavalcante. Their 2022 album Rex Maximvs — released jointly through Resistencia Underground, Satanic Sound Records, and Kingdom of Darkness — contains seven tracks and was issued in CD digipack format.

Radio Everett is a one-person metal project from Belford Roxo, Rio de Janeiro, created and performed entirely by Matheus Everett on guitar and vocals. The project spans grindcore, black metal, and death metal across a prolific Bandcamp discography, including the 2020 album Operação Belford Roxo and the 2024 release Operação Inferno: Belford Roxo, with recurring lyrical focus on Belford Roxo itself.

Radio Resistencia is a heavy/thrash metal band from Bogotá, Colombia. They released their self-titled debut full-length in 2025, operating as an independent act on the Colombian underground metal scene. The band formed in 2014 according to Metal Archives and remain active.

Rage Darkness is a gothic/death metal band from Curitiba, Paraná, formed in 2008, with a lineup anchored by Vinne on rhythm guitars, vocals, and drums, Juliano Moser on lead guitar, and Caco Ramos on bass. Their 2015 album Engine of Misanthropy, produced by Alexandre Cegalla and featuring symphonic arrangements by Maiko Thomé, spans eleven tracks and explores psychological themes of misanthropy and inner conflict.

Rage in My Eyes is a heavy/power metal band from Porto Alegre formed in 2019 as the continuation of Scelerata, a group active since 2002. Their debut album Ice Cell, recorded in Porto Alegre and Los Angeles and produced by Adair Daufembach, was released in 2019; the band opened for Iron Maiden in Porto Alegre on October 9 of that year, and guitarist Magnus Wichmann is a grandson of the renowned gaúcho folk musician Teixeirinha.