"Orion" is the 7th track on Metallica's 1986 album "Master of Puppets", and is the only instrumental on Guitar Hero: Metallica. The song is 8:25 in length and features multiple harmonized lead lines by guitarists James Hetfield and Kirk Hammett, mostly arranged/written by late Metallica bassist Cliff Burton, as well as solos from all 3 musicians, although the bass solos Cliff performed are usually mistaken for guitar solos.