The albums below is my definition of extreme metal music, regardless of their genre. Entire list is based only on my personal preferences in metal.
Rules:
1. One album per band
2. 305 groups/305 albums

1.In Flames - Clayman

2.Metallica - ...And Justice For All

3.Chimaira - Chimaira

4.Death - Symbolic

5.Testament - The New Order

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1.Moonsorrow - Voimasta Ja Kunniasta

2.Primordial - To The Nameless Dead

3.Moonsorrow - Kivenkantaja

4.Ensiferum - Ensiferum

5.Orphaned Land - Mabool: The Story Of The Three Sons Of Seven

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1.Esoteric - The Maniacal Vale

2.Darkspace - Dark Space III

3.Equilibrium - Sagas

4.Septicflesh - Communion

5.Ayreon - 01011001

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Time has moved on and so has my taste. There is music I didn't listen to back then but also albums I still love even though I don't listen to them as much anymore.

1.Agalloch - The Mantle

2.Aquilus - Cloak Of Autumn Shroud

3.Aquilus - Griseus

4.Babymetal - Metal Resistance

5.Babymetal - Metal Galaxy

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1.Septicflesh - Communion

2.Opeth - Watershed

3.Moonspell - Night Eternal

4.Meshuggah - ObZen

5.Enslaved - Vertebrae

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This is my personal favourite top 50 albums of all time, this list can change because i can enter new things and my tastes may differ over time.

IS NOT UPDATED!

1.Cult Of Luna - Somewhere Along The Highway

2.Ulver - Perdition City

3.Agalloch - Ashes Against The Grain

4.Queensrÿche - Operation: Mindcrime

5.Bolt Thrower - Those Once Loyal

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in no particular order

1.At The Gates - At War With Reality

2.Eluveitie - Origins

3.Opeth - Pale Communion

4.Alestorm - Sunset On The Golden Age

5.Equilibrium - Erdentempel

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1.Sacramentum - Far Away From The Sun

2.Wintersun - Time I

3.Hypocrisy - Hypocrisy

4.Metallica - Master Of Puppets

5.Dissection - Storm Of The Light's Bane

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1.Equilibrium - Sagas

2.Moonsorrow - Tulimyrsky

3.Kivimetsän Druidi - Shadowheart

4.Eluveitie - Slania

5.Forefather - Steadfast

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These are the first albums I listened to when I got into metal.
I've outgrown some of them but hell these albums will always be special to me.

1.Judas Priest - Painkiller

2.Twisted Sister - Stay Hungry

3.Eluveitie - Slania

4.Ensiferum - Victory Songs

5.Amon Amarth - Twilight Of The Thunder God

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1.Equilibrium - Sagas

2.Forefather - Steadfast

3.Machinae Supremacy - Overworld

4.Opeth - Watershed

5.Amon Amarth - Twilight Of The Thunder God

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1.Norther - N

2.Machinae Supremacy - Overworld

3.Raunchy - Wasteland Discotheque

4.Metallica - Death Magnetic

5.Into Eternity - The Incurable Tragedy

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1.Draconian - Turning Season Within

2.Cradle Of Filth - Godspeed On The Devil's Thunder

3.Moonspell - Night Eternal

4.Therion - Live Gothic

5.Heavenwood - Redemption

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An interesting year considering many of my favourite bands with a relative big discography released strong albums (Tiamat, Judas Priest, Cradle of Filth, Opeth, Moonspell, Metallica). Overall, it's not the best of years. The first three on the list are the definitive highlights.

1.Tiamat - Amanethes

2.Equilibrium - Sagas

3.Lifelover - Konkurs

4.Judas Priest - Nostradamus

5.Seventh Wonder - Mercy Falls

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