745 articles
Oathbreaker (band)
Oathbreaker is a Belgian extreme metal band from Ghent, formed in 2008 and fronted by vocalist Caro Tanghe, best known for the 2016 album Rheia.
Obituary (band)
Obituary is an American death metal band formed in 1984 in the Tampa, Florida area and one of the pioneering groups of the Florida death metal scene.
Obscene Extreme
Obscene Extreme is an annual extreme-music festival focused chiefly on grindcore, held at the Bojiště ground in Trutnov, Czech Republic, and first staged in 1999 by Miloslav "Čurby" Urbanec.
ObZen
ObZen is the sixth studio album by Swedish extreme metal band Meshuggah, released in 2008, whose song "Bleed" became their signature track and a reference point for the djent style.
Ocean Sleeper
Ocean Sleeper is an Australian metalcore band from Gippsland, Victoria, formed in 2016, also styled a pop-metal act. Known for Don't Leave Me This Way (2019), the EPs Is It Better Feeling Nothing and Maybe Death Is All I Need, and the 2026 sophomore album Peace When I'm Dead on Rise Records/BMG.
Of Mice & Men (band)
Of Mice & Men: American metalcore band formed 2009 in Costa Mesa, California, by Austin Carlile and Jaxin Hall, named after Steinbeck's novel. Nine albums; Aaron Pauley has fronted since Carlile's 2016 exit over Marfan syndrome.
Old school death metal (music genre)
Old school death metal (OSDM) is death metal played in the style of the late 1980s and early 1990s, strongest in Sweden and the United States.
Om (band)
Om is an American stoner/drone/doom metal band formed in 2003 in San Francisco by ex-Sleep members Al Cisneros and Chris Hakius; Emil Amos later joined on drums. Five albums through Advaitic Songs (2012) on Drag City. Distinct from unrelated acts named Om.
Omen (group)
Omen is an American heavy metal band formed in Los Angeles in 1983 by guitarist Kenny Powell, known for melodic power metal albums like Battle Cry (1984).
Omnium Gatherum
Omnium Gatherum, often shortened to OG, is a Finnish melodic death metal band formed in 1996 in Karhula, Finland, with ten studio albums and guitarist Markus Vanhala as its only constant member.
Once Human (band)
Once Human: Los Angeles melodic death/groove metal band formed in 2014 by ex-Machine Head guitarist Logan Mader and vocalist Lauren Hart; three earMUSIC albums, split up in 2022 before Hart joined Arch Enemy.
Oomph!
Oomph! is a German Neue Deutsche Härte band formed in Wolfsburg in 1989, regarded as pioneers of the genre before Rammstein carried it to a worldwide audience.
Opeth
Opeth, Swedish progressive metal/rock band from Stockholm formed in 1990, led by Mikael Åkerfeldt; known for Blackwater Park, Ghost Reveries, the 2011 clean-vocal turn on Heritage, and 2024's The Last Will and Testament.
Orbit Culture
Orbit Culture is a Swedish melodic death metal band formed in Eksjö, Sweden, in 2013 by frontman Niklas Karlsson, known for albums like Nija and Death Above Life.
Orden Ogan
Orden Ogan is a German power metal band from Arnsberg in North Rhine-Westphalia, led by Sebastian "Seeb" Levermann, with seven studio albums and two consecutive Top 3 German chart entries.
Orgy (band)
Orgy is a Los Angeles electronic rock/industrial band formed in 1997, led by Jay Gordon, whose 1998 debut Candyass and New Order "Blue Monday" cover made it a fixture of the late-1990s nu metal scene on Korn's Elementree label.
Otep
Otep: American nu metal/alternative metal band formed in Los Angeles in 2000 by vocalist Otep Shamaya (name anagram of "poet"). Known for Ozzfest 2001 discovery by Sharon Osbourne, albums Sevas Tra through The God Slayer (2023), and political lyrics.
Our Last Night
Our Last Night: American post-hardcore band formed 2004 in Hollis, New Hampshire, by the Wentworth brothers; signed to Epitaph (2007-2012), then independent, famous for viral heavy covers of pop songs like Skyfall and Radioactive.
Outrage
Outrage (アウトレイジ) is a Japanese thrash/speed metal band formed in Nagoya in 1982, called a pioneer of Japanese heavy metal and still active after four decades.
Ov Sulfur
Ov Sulfur is a Las Vegas blackened deathcore band formed in 2020 by ex-Suffokate vocalist Ricky Hoover. Signed to Century Media, it released The Burden Ov Faith (2023) and Endless (2026), blending symphonic and black metal elements with anti-religious lyrics.
Overkill (band)
Overkill: New Jersey thrash metal band formed in 1980, named after Motörhead's 1979 album; fronted since founding by Bobby "Blitz" Ellsworth and D.D. Verni, with twenty studio albums from Feel the Fire (1985) to Scorched (2023).
Ozzfest
Ozzfest is a heavy metal festival founded in 1996 by Ozzy and Sharon Osbourne after Lollapalooza declined Ozzy a slot, held almost annually until 2018 and returning in 2027.
Ozzfest lineups by year
Ozzfest lineups by year: the touring heavy-metal festival founded by Sharon and Ozzy Osbourne in 1996 after Lollapalooza rejected Ozzy, with year-by-year headliners, second-stage breakthrough acts, Japan editions, and the 2016–2018 Knotfest revivals.
Ozzy Osbourne Band
Ozzy Osbourne Band: the backing group of the former Black Sabbath singer, formed as Blizzard of Ozz in 1979-80 with Randy Rhoads and Bob Daisley; guitarists Rhoads, Jake E. Lee, Zakk Wylde, Gus G; 13 albums; final show 2025.
P.O.D.
P.O.D. (Payable on Death) is a San Diego rock band formed in 1992, blending nu metal, rap, reggae, and punk with Christian themes; best known for the triple-platinum 2001 album Satellite and hits "Alive" and "Youth of the Nation".
Pagan Altar
Pagan Altar is an English doom metal band formed in Brockley, London in 1978 around the father-and-son core of vocalist Terry Jones and guitarist Alan Jones.
Painkiller (group)
Painkiller is an avant-jazz and grindcore supergroup formed in New York in 1991 by John Zorn, Bill Laswell, and Napalm Death drummer Mick Harris, reuniting in 2024.
Paleface Swiss
Paleface Swiss is a Swiss deathcore and beatdown band formed in Zurich in 2017, fronted by Marc "Zelli" Zellweger. Formerly just Paleface, renamed in 2023; albums include Fear & Dagger and the self-released Cursed (2025), followed by The Wilted EP (2026).
Palm muting
Palm muting is a guitar technique in which the picking hand damps the strings near the bridge, producing the tight chugging tone of heavy metal riffs.
Pantera
Pantera is an American groove metal band formed in Arlington, Texas, in 1981 by the Abbott brothers; glam-era albums preceded Cowboys from Hell (1990), four platinum 1990s records, a 2003 breakup, and a 2022 reunion with Zakk Wylde and Charlie Benante.