Shifting the focus from tearaway solos to syncopated riffing, nu-metal hurtled into existence with Korn's famously intense 1994 debut LP. When the genre went fully mainstream a couple of years later, bands were recombining sources as far-flung as percolating funk, mouthy rap, and brooding grunge. These enduring cuts showcase the strongest of a scene that mutated almost faster than we could keep up.