Raza Odiada is a heavy metal band from González Catán, Buenos Aires, Argentina with a prolific output spanning over two decades, including the albums "Cementerio de Mujeres" (2004), "Igual Que Ayer" (2005), "Aca No Se Rinde Nadie" (2019), and "Heavy Metal Circus" (2024). The band's core songwriting has been driven by guitarists Abraham Morales Acosta and vocalist Alberto Escalante Gonzales.

Razón de Acero is a melodic death and groove metal band from Santiago, Chile, formed in 2009. The band — whose name translates to "Reason of Steel" — released their debut EP "Desde El Caos" in 2010 and have remained an independent act throughout their career. Their lyrics center on themes of existentialism, perseverance, and inner struggle.

Razón de Ser is a heavy metal band from Comodoro Rivadavia, Argentina featuring vocalist Daniel Baulde, guitarists Miguel González and Ramiro Martínez, bassist Víctor Gómez, and drummer Lorenzo Martins. Their self-titled debut album, released on June 6, 2019, was recognized in the "Headbangers Latinoamérica" survey among South America's most outstanding releases of that year.

Reactive Delusion is a progressive death metal band from San Fernando del Valle de Catamarca, Argentina, built around the guitar work and production of Emiliano Tula alongside vocalist León Pardo and bassist Diego Diaz. Their debut EP "Paradox of Perception," released on June 1, 2015 and produced at RD Studios, blends technical death metal with synthesizers and keyboards across six tracks.

Real Insane is a thrash metal band from Ibiúna, São Paulo, formed in 2018, with a lineup of Rodrigo (guitars, vocals), Bruno (guitar), Paulo (bass), and Cidão (drums). Their debut release was the six-track EP Underworld, recorded at Laboratório Underground in May 2018 and released the following month.

Realidade Encoberta is a crossover thrash band from Recife, Pernambuco, originally founded in 1987 by Nado and Daniel Malcriado; the band disbanded after Nado's death and reconstituted in 2013 with a new lineup anchored by vocalist Carlos Underground and guitarist Túlio Falcão. Since the reunion they have released Momentos Antes do Caos (2014), Morte e Progresso (2016), and Não Vivamos Mais Como Escravos (2019), the last of which closes with a Minor Threat cover.

Realidade Mórbida is a two-person grindcore project from Paraíba, Brazil, formed in October 2019 by Paulo Anarkio (vocals) and João Terrorizer (guitars, bass, drum programming). The duo released the demo Desordem e Retrocesso in 2020 and the EP Metamorfose Degenerada.

Reassônica is a heavy metal and hard rock band from Fortaleza, Ceará, formed in 2010, with a lineup of Márcio (vocals), Rogério Soares (guitar), Emanuel (guitar), Heryson (bass), and Bruno (drums). The band recorded two demos in 2016 and 2017 before releasing their self-titled five-track EP in May 2018 on Vampire Records; the group writes from an explicitly Christian perspective.

Rebhellion was a melodic death metal band from San Nicolás de los Arroyos, Argentina, featuring vocalist Walter Ortiz, guitarists Pablo Cubilla and Julian Garcia, bassist El Brujo, and drummer Nachi Fernandez. Among their releases was the 2018 album "Resistiendo al Poder," an 11-track record with socially themed songs including "Vuelos de la Muerte" and "Maltrato Social."