Prolific UK grindcore legends Napalm Death unload 31 riotous rarities and covers on this ferocious collection. The sinister “Oxygen of Duplicity”—from a 2013 Melvins split—plays doomy foil to quick, sharp shocks like the anarchic bonus track “It Failed to Explode” and the roaring Nepal earthquake benefit song “Earthwire.” Meanwhile, ripping covers of underground daredevils Gauze (“Crash the Pose”), Despair (“Outconditioned”), Cardiacs (“To Go Off and Things”), and Sacrilege (“Lifeline”) are peppered throughout this stockpile of hard-to-find grind.