The digital-only boxed sets Extreme Metal 101, Volumes 1-4, are available now. Each of these sets includes five crushing releases from the Roadrunner catalog, including four albums never before available digitally. Each box is $24.99, and they’re available on iTunes and via other digital music retailers.

Here’s what you get:

Extreme Metal 101, Vol. 1 

Deicide, Deicide 

Malevolent Creation, The Ten Commandments 

Obituary, Slowly We Rot 

Pestilence, Consuming Impulse 

Suffocation, Pierced From Within

Get it now on iTunes

 

Extreme Metal 101 Vol. 2

 Brujeria, Matando Gueros 

Carnivore, Retaliation 

Death, Symbolic 

Gorguts, Considered Dead 

Immolation, Dawn of Possession (available digitally for the first time)

Get it now on iTunes

 

Extreme Metal 101 Vol. 3 

Cynic, Focus 

Deicide, Legion

Obituary, Cause of Death 

Pestilence, Testimony of the Ancients 

Sadus, Chemical Exposure (available digitally for the first time)

Get it now on iTunes

 

Extreme Metal 101 Vol. 4

Annihilator, Alice in Hell 

Cerebral Fix, Bastards (available digitally for the first time)

Defiance, Beyond Recognition (available digitally for the first time)

Exhorder, The Law

Fear Factory, Soul of a New Machine