Krisiun is a Brazilian death metal band formed in 1990 by brothers Alex Camargo, Moyses Kolesne, and Max Kolesne, three siblings from the south of Brazil who have maintained the same lineup for their entire career. After a series of self-released demos and an EP in the early 1990s, the band broke internationally with Black Force Domain (1995) and Apocalyptic Revelation (1998) before signing to Century Media for a run of albums defined by relentless blast beats and technically precise brutality. They remain one of Latin America's most enduring and prolific death metal acts, with Mortem Solis arriving in 2022.

Krisiun is a death metal band from Ijuí, Rio Grande do Sul, Brazil, formed in 1990 by brothers Alex Camargo (bass and vocals), Moyses Kolesne (guitar), and Max Kolesne (drums) — a power-trio lineup that has remained unchanged. The band released their debut full-length Black Force Domain in 1995 on Dynamo Records, followed by Apocalyptic Revelation in 1998, before signing to Century Media in 1999 and releasing a further ten studio albums. Krisiun became a benchmark of the Brazilian extreme metal scene, defined by blistering speed, relentless precision, and an uncompromising refusal to soften their sound over more than three decades.

Krists Død is a black metal band from Curitiba, Brazil, formed in 2023. The band released the single "Symfonía Tou Sataná" in 2023, signaling their entry into the extreme underground.

Kriver was a metal band from Recife, Pernambuco, Brazil, active from 2009 to 2014. Beginning with a heavy metal and hard rock approach, the band evolved toward progressive metal over three EPs, culminating in "Foresight" (2014), a four-track release praised for its blend of heavy riffs, intricate melodies, and atmospheric songwriting. The lineup included Rafael Gorga (vocals), Bruno Oliveira and Marcelo Neves (guitars), Guilherme Cordasso (bass), and Ricardo Lira (drums).

Krod is a one-man black metal project formed in Santiago, Chile in 2021 by Zabulus Valtakunta, who handles all instruments and vocals in an effort to maintain what he describes as the roots of black metal without adornments that deviate from its anti-Christian essence. The project has been prolific since its founding, releasing four full-lengths in its first three years: Total Destroyer and Rotten Gods Burn in the Abyss of Serpents (both 2021), Black Metal Legion (2022), and Satanas Rex Inferni (2023).

Krogan is the solo project of Peruvian-American musician Esteban Cueto, based in Lima, Peru, working across melodic death, stoner, groove, and doom metal. The project is prolific and experimental, with a string of releases since 2023 including the debut full-length "Warpath" in 2024, on which Cueto handled all vocals, guitar, and bass.

Kromorth is a death metal band from Cuiabá, Mato Grosso, Brazil, founded around 1999–2000 by guitarist and vocalist Rodrigo Auad. After a hiatus from 2007 to 2012, the band stabilized with a lineup including Fabio Agassi (guitar), Lincoln Lima (bass), and Elton Bernardino (drums), releasing the full-length debut "Geodesic Beast" in November 2018 through Iron Blood & Death Corporation.

Kronus was a heavy metal band from Rio de Janeiro, Brazil, active from 1985 to 1988. The band released a rehearsal demo in 1985 and a demo titled "Muerte Lenta," covering themes of fantasy, freedom, and war before dissolving.

Krossover is a thrash and groove metal band formed in August 2013 in Reconquista, Santa Fe, Argentina. The band contributed the track "Inhumano" to the regional compilation "Paraná Bandas Oficial EP 7" in August 2016, building a following in the northeastern Argentine metal underground. They maintain an active presence on SoundCloud and Bandcamp as an independent act.