- Kalmah "Seventh Swamphony" (2013)
- Kamelot "The Fourth Legacy" (1999)
- Kamelot "Karma" (2001)
- Kamelot "Epica" (2003)
- Kamelot "Ghost Opera" (2007)
- Kamelot "Poetry For The Poisoned" (2010)
- Kamelot "Silverthorn" (2012)
- Kamelot "Haven" (2015)
- Kataklysm "Epic: The Poetry Of War" (2001)
- Kataklysm "Serenity In Fire" (2004)
- Kataklysm "Heaven's Venom" (2010)
- Kataklysm "Waiting For The End To Come" (2013)
- Kataklysm "Of Ghosts & Gods" (2015) [includes 4 bonus tracks]
- Kataklysm "Unconquered" (2020)
- Katatonia "Brave Yester Days" [compilation] (2004)
- Katatonia "Dead End Kings" (2012)
- Keel "The Right To Rock" (1985) [2000 CD re-release with bonus track "Easier Said Than Done" (Remix)]
- Khert Neter "Images Of Khepri" (2005)
- Khonsu "Anomalia" (2012)
- Kiju "Nothing To Play For" (2002)
- Kill The Client "Escalation Of Hostility" (2005)
- Killer Be Killed "Killer Be Killed" (2014)
- Killer Be Killed "Reluctant Hero" (2020)
- Killers "Menace To Society" (1994)
- Killswitch Engage "Killswitch Engage" (2000)
- Killswitch Engage "Alive Or Just Breathing" (2002)
- Killswitch Engage "The End Of Heartache" (2004)
- Killswitch Engage "As Daylight Dies" (2006)
- Killswitch Engage "Killswitch Engage" (2009)
- Killswitch Engage "Disarm The Descent" (2013)
- Killswitch Engage "Incarnate" (2016)
- Killwire "Empty Cell" (2011)
- King Diamond "Fatal Portrait" (1986) [1997(?) remaster with "No Presents For Christmas" and "The Lake"]
- King Diamond "Abigail" (1987)
- King Diamond "Them" (1988)
- King Diamond "The Dark Sides" [EP] (1989)
- King Diamond "Conspiracy" (1989)
- King Diamond "The Eye" (1990)
- King Diamond "The Spider's Lullabye" (1995)
- King Diamond "The Graveyard" (1996)
- King Diamond "Voodoo" (1998)
- King Diamond "House Of God" (2000)
- King Diamond & Black Rose "20 Years Ago: A Night Of Rehearsal" (2001)
- King Diamond "Abigail II: The Revenge" (2002)
- King Diamond "The Puppet Masters" (2003)
- King Diamond "Give Me Your Soul... Please" (2007)
- King Hitter "King Hitter" [EP] (2015)
- King Kobra "Ready To Strike" (1985)
- Kingdom Of Sorrow "Behind The Blackest Tears" (2010)
- Kings, The "Are Here And More" [compilation?] (2000)
- King's X "King's X" (1992)
- King's X "Please Come Home... Mr. Bulbous" (2000)
- Kinzel, Nate "Eventgarden: Christmas/Synthesis" (2005?) [CDR]
- Kiss "Kiss" (1974)
- Kiss "Hotter Than Hell" (1974)
- Kiss "Dressed To Kill" (1975)
- Kiss "Destroyer" (1976)
- Kiss "Rock And Roll Over" (1976)
- Kiss "Love Gun" (1977)
- Kiss "Dynasty" (1979)
- Kiss "Unmasked" (1980)
- Kiss "Music From The Elder" (1981)
- Kiss "Creatures Of The Night" (1982)
- Kiss "Lick It Up" (1983)
- Kiss "Animalize" (1984)
- Kiss "Asylum" (1985)
- Kittie "Spit" (1999)
- Kittie "Oracle" (2001)
- Kittie "Until The End" (2004)
- Kittie "Funeral For Yesterday" (2007)
- Kittie "In The Black" (2009)
- Kittie "I've Failed You" (2011)
- Kix "Kix" (1981)
- Kix "Midnite Dynamite" (1985)
- Kix "Blow My Fuse" (1988)
- Klingon Pop Warrior (AKA Pop Warrior AKA jenbom vestai-toQqul AKA Jen Usellis) "Warrior Woman" (2014)
- Klingon Pop Warrior (AKA Pop Warrior AKA jenbom vestai-toQqul AKA Jen Usellis) "bommey qu'" {Fierce Songs} (2017)
- Klingon Pop Warrior (AKA Pop Warrior AKA jenbom vestai-toQqul AKA Jen Usellis) "ta'mey Dun! bommey Dun!" {Great Deeds! Great Songs!} (2021) + 5 Klingon pins + Pop Warrior pin
- Kontinuum "Kyrr" (2015)
- Korn "Korn" (1994)
- Korn "Life Is Peachy" (1996)
- Korn "Follow The Leader" (1998)
- Korn "Issues" (1999)
- Korn "All Mixed Up" [EP] (2001) [bonus disc included with "Issues"]
- Korn "Untouchables" (2002)
- Korn "Take A Look In The Mirror" (2003)
- Korn "See You On The Other Side" (2005)
- Korn "Requiem" (2022)
- Kosmic Horrör "Zarkov Protocols Vol. 1" (2004)
- Kovenant, The "Animatronic" (1999)
- Kreator "Extreme Aggression" (1989)
- Kreator "Coma Of Souls" (1990)
- Kreator "Enemy Of God" (2005)
- Kreator "Phantom Antichrist" (2012)
- Kreator "Gods Of Violence" (2017)
- Krisiun "Apocalyptic Revelation" (1998) [2013 remastered release w/six bonus tracks]
- Krisiun "Bloodshed" [EP] (2004)
- Krisiun "AssassiNation" (2006)
- Krisiun "Southern Storm" (2008)
- Krisiun "The Great Execution" (2011)
- Krisiun "Forged In Fury" (2015) [digipak edition w/two bonus tracks]
- Krokus "The Definitive Collection" [compilation] (2000)
- Krush "Grind Blender" (2000)
- Kung Pao "Sheboygan" (2002)
- Kvelertak "Meir" (2013)
- Kvikksølvguttene "Krieg" (1997)
- Kylesa "Spiral Shadow" (2010)
- Kylesa "Ultraviolet" (2013)
- Kylesa "Exhausting Fire" (2015)
- Kypck [Kursk] "Cherno" (2008)
- Kyuss "Wretch" (1991)
- Kyuss "Blues For The Red Sun" (1992)
- Kyuss "Welcome To Sky Valley" (1994)
- Kyuss "...And The Circus Leaves Town" (1995)
- Kyuss "Muchas Gracias: The Best Of" [compilation] (2000) [contains B-sides and live tracks]