Suffocation, one of the earliest American death metal bands. They approached this genre in their own style, revolving around heavy, uniquely rhythmic riffs to create a sub-genre of the form often termed "brutal" death metal - also known by many as "New York Death Metal," or "nydm" for short. Others in this form include Immolation, Incantation, Deathrune, Morpheus Descends, Infester and many others.