'''''The Definitive Nine Inch Nails''''' (usually referred to as '''''The Definitive NIN''''') is a four-part collection of Nine Inch Nails' greatest hits. The first three parts were originally released as a three-disc collection via BitTorrent. These were later expanded and a fourth part was added via the nin:access iPhone app and the "Listen" section of [[nin.com]]. They were again modified when they were posted on the [http://soundcloud.com/nineinchnails official NIN SoundCloud account].