So it's 31st December 1984

Black Sabbath - Master of Reality
Rainbow - Long Live Rock & Roll
Metallica - Ride the Lightning 
Iron Maiden - Killers
AC/DC - Highway to Hell
Celtic Frost - Morbid Tales
Motorhead - Overkill
Mercyful Fate - Melissa
UFO - Phenomenon
Judas Priest - British Steel

Good thing it's about what I know now versus that of what I knew then as a thirteen year old.

#10 "Fighting" (Thin Lizzy)
# 9 "Spellbound" (Tygers of Pan Tang)
# 8 "Shout at the Devil" (Motley Crue)
# 7 "Creatures of the Night" (KISS)
# 6 "Heaven and Hell" (Black Sabbath)
# 5 "Screaming For Vengeance" (Judas Priest)
# 4 "2112" (Rush)
# 3 "Iron Maiden" (Iron Maiden)
# 2 "Paranoid" (Black Sabbath)
# 1 "Ride The Lightning" (Metallica)

It's really hard to get this list correct, as there are so many that could have cracked the top 10, but I feel pretty good about the #1 spot. This was Metallica's magnum opus.