They borrow from so many genres
Metal, Nu-Metal, Djent, Death Metal, Prog, Melodic Metal
They aren't nu metal
Nils from Agathocles
Anvil from Acid
Walter van Cortenberg from Ancient Rites
Chris De Brauwer from Crossfire
Cernussos from Enthroned
Rony from Iron Clad/Lion's Pride
John Berry from Slaughter Messiah
Eddy De Logi from Thee Plague of Gentlemen
Frederik Cosemans from Serpent Cult
Pz. Kpfw of Possession
Death metal ??
Slipknot is considered a nu metal band. ... The album All Hope Is Gone is considered a groove metal album with elements of death metal and thrash metal. The band has also been described as heavy metal, alternative metal groove metal, death metal, hard rock, grindcore, thrash metal, and rap metal.