The sound
It is hard to classify the sound. Some of it was formed by pioneers like Obituary. Morrisound Studios also helped define it with releases of bands like Massacre. The vocals tended to be growling, grunting, or screaming with the lyrics. Some bands, like Nocturnus, even used heavy synthesizer effects in some of their releases. The production quality was often less than perfect, but fans of the genre worried more about an aggressive, brutal sound than things like production.
Bands
Acheron
Angel Corpse
Atheist
Brutality
Cystic Dysentery
Cynic
D.B.S.
Death
Decrepit Skeleton
Deicide
Disposable Soul
Divine Empire
Execration
Hellwitch
Hibernus Mortis
Horde of Impurity
Impurity
Infernal
Iodine Sorrow
Malevolent Creation
Massacre
Monstrosity
Morbid Angel
Nailshitter
Nocturnus
Obituary
Ogre Envy
Other Voices
Patricide
Piercing
Pleasent Insane
Purulent
Raped Ape
Siodine
Soul of the Savior
The Absence