Although Australia's Parkway Drive are generally classified as metalcore, the band also take cues from deathcore's down-tuned growls and venomous metal riffs. The group's mid-'00s work honed in on heaviness—witness the sledgehammering breakdown of the '80s thrash throwback "Boneyards," or the underworld-banshee snarls driving the bruising "Romance Is Dead." On later studio albums, Parkway Drive have paired pulverizing blast beats and gouging grooves with more sophisticated flourishes, including gang vocals ("Vice Grip"), nu-metal jawing ("Crushed"), and gravelly sludge rock ("Dark Days").