A Lower Austrian goregrind project driven by sole instrumentalist Louis Simmer and vocalist Azerate Nakamura, Radiologist self-describes their sound as '100% Medically Accurate Brutal Goregrind.' Releases like Subdural Hematoma Removal and A Lethal Dose lean into anatomical horror imagery and relentlessly visceral extreme metal.

Rancid Taint Discharge is a brutal death metal band from Turku, Finland, formed in 2020. The band delivers punishing, uncompromising brutality from Finland's former medieval capital.

Raster Density is a progressive/brutal death metal band from Jyväskylä in central Finland, active since 2012. The band merges progressive complexity with brutal death metal extremity from the Finnish lake district.

Ratpile is a slam/brutal death metal band from Lancashire in northwest England, formed in 2019. The band delivers punishing slam and brutal death metal from the industrial north.

Rectal Devastation is a slam/brutal death metal and goregrind band from West Yorkshire, England, active since 2011. The band delivers extreme slam and goregrind from the industrial north.

Rectal Implosion is a technical/brutal death metal band from Leeds in West Yorkshire, England, formed in 2014. The band delivers precision brutality from the major city of northern England.

Goregrind and brutal death metal band from Naaldwijk, the Netherlands, with roots dating to 2004. Two decades of deliberately grotesque extreme metal from the South Holland greenhouse district.

Rectal Terror is a brutal deathcore act from Minsk, Belarus, emerging in 2025 as part of the city's growing extreme metal underground. The project channels punishing breakdowns and guttural vocals characteristic of the genre's most uncompromising strain.

Red Means No Mercy is a brutal deathcore band from Kassel in northern Hesse, Germany, formed in 2018. The band delivers punishing breakdowns and extreme vocal performances as part of Kassel's active extreme metal scene.