Albums by year: 2004: Page 5
- Inward Escape
- Iommi
- Iron Angel
- Iron Maiden
- Iron Savior
- Isis
- Isvind
- Jag Panzer
- Japanische Kampfhörspiele
- Jason
- The Jelly Jam
- Jennifer Will Drown
- jesu
- Jezabel (COL)
- Jigsore Terror
- Jon Oliva's Pain
- Jose Andrea
- Jørn
- Judas Priest
- Jungle Rot
- Kaamos
- Kania
- Karkadan
- Karl Sanders
- Katagory V
- Kataklysm
- Katatonia
- Bob Katsionis
- Kekal
- Kenos
- Kevin Moore
- Khold
- Killswitch Engage
- Kill The Client
- King Diamond
- Kingdom Come
- King's X
- Kittie
- Kiuas
- Koldbrann
- Korn
- Korpiklaani
- Korzus
- Kotipelto
- Kragens
- Krieg
- Krisiun
- Krohm
- Kryptos
- Vitalij Kuprij
- L6B6T6MY
- Lacuna Coil
- L.A. Guns
- Lair of the Minotaur
- Lake of Tears
- Lamb of God
- Leaves' Eyes
- Leicohtica
- Leprechaun
- Leprous
- Lethal (SWE)
- Let Me Dream
-
Leviathan (USA - CA)
Leviathan/Xasthur Split (EP) (w/ Xasthur)
- L.I.G.O. (Laser Interferometer Gravitational Wave Observatory)
- Lilitu
- Lionsheart
- The Living Fields
- Living Loud
- Loch Vostok
- Lord Belial
- Lord Gore
- Lordi
- The Lord Weird Slough Feg
- Dan Lorenzo
- Loudness
- A Lower Deep
- Ludicra
- Luftwaffe Raid
- Lugubrum
- Lullacry
- Lunaris
- Lunatica
- Lunatic Gods
- Luthor
- Machine Head
- Madmen and Sinners
- Madsic
- Magica
- Magic Kingdom
- Magika
- Magnitude 9
- Mago de Oz
- Majesty (GER)
- Malevolent Creation
- Malignant Monster
- Malsain
- Manigance
- Manitou (FIN)
- Manticora
- Mar de Grises
- Marduk
- Marilyn Manson
- Martyr AD
- Masquerade
- Massemord
- Masterplan
- Master (RUS)
- Mastodon
- Mayhem
- MCM
- Meat Wallet
- Mechanical Poet
- Meduza
- Megadeth
- Hubi Meisel
- Melektaus
- Meliah Rage
- Memories Lab
- Memory Garden
- Mental Terror
- Mercenary
- Merrimack
- Meshuggah
- Messiah's Kiss
- Metal Church
- Metalium