I know few of the Grindcore bands , want to explore much of this genre. Please let me know the few of the kickass/underground grindcore with album names. Grindcore is sickness \mmm/

Few of the bands which i know is Nasum , Carcass , Pig Destroyer , Fuck ...i'm dead , Exhumed , Last Days of Humanity , Brutal Truth , Cephalic Carnage , Birdflesh ,Napalm Death , Circle of Dead Children , Anal Cunt and yeah GxMx . Also someone please tell me about subgenres of grindcore .. porn grind ?? gore grind ?? what are they ?? bands ??