Killing Mass was a death/thrash metal band from Santiago, Chile, whose sole known release is the 2017 EP Bloody Lands — a five-track recording encompassing both old-school thrash and death metal styles. The band has since split up, leaving Bloody Lands as their only documented output.

Killrape is a thrash/death metal band from Rio de Janeiro, Brazil, active since 1993 under the earlier name Corrosive, founded by brothers Nilmon Filho (guitars) and Rodson Lemos (bass and vocals). The band released their debut full-length Corrosive Birth in May 2010, followed by Corrosive Legion in 2011, with subsequent releases including Corrosive Master and Corrosive Reincarnation... Reborn in Hell available via Bandcamp. Their self-described style blends aggression with destructive melodies in the tradition of extreme Brazilian metal.

Knightrider is a thrash/death metal band from Salvador, Bahia, Brazil, documented on the Encyclopaedia Metallum with a discography that includes the war-themed demo "War" (2003). The band's lyrical content centers on the subject of war. They remain an independent act within the underground metal scene of northeastern Brazil.

Koriza is a thrash/death metal band from Ilhéus, Bahia, Brazil, with a listing on the Encyclopaedia Metallum that includes the demo "Defluxo" among their early releases. The band operates out of a city better known as a literary landmark — the birthplace of writer Jorge Amado — making them a notable presence in Bahia's underground extreme metal scene. They have maintained an active Spotify presence alongside their long-running career.

Kriegskanone is a death metal band from Manizales, Caldas, Colombia, formed in 2017 and focused on war-themed material. The band released the EP "Tiempos de gloria" in 2017, with members who also play in local acts including Mauser 98 and Militant.

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.

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.

Krow is a thrash/death metal band from Uberlândia, Minas Gerais, Brazil. The band released the debut full-length "Before the Ashes" in 2009 and followed it with "Traces of the Trade" in 2012, the latter produced by American engineer Alan Douches and notable for its thematic focus on Brazilian slavery. The album draws on late-1980s and early-1990s death metal roots with a thrash punch.