The Wikipedia has a nice update with the first six tiers of songs completely filled out. They also indicated that the October 10th issue of the official Playstation magazine will include a playable demo of Guitar Hero II with four songs (“Shout at the Devil”, “Strutter”, “YYZ”, and “You Really Got Me”).

  1. Opening Licks

  • Motley Crue - Shout at the Devil

  • Danzig - Mother

  • Cheap Trick - Surrender

  • Wolfmother - Woman

  • Spinal Tap - Tonight I’m Gonna Rock You Tonight

  1. Amp-Warmers

  • Kiss - Strutter

  • Nirvana - Heart-Shaped Box

  • Police - Message in a Bottle

  • Van Halen - You Really Got Me

  • Kansas - Carry on Wayward Son

  1. String-Snappers

  • Foo Fighters - Monkey Wrench

  • Alice in Chains - Them Bones

  • Iggy Pop and the Stooges - Search and Destroy

  • Pretenders - Tattooed Love Boys

  • Black Sabbath - War Pigs

  1. Thrash and Burn

  • Warrant - Cherry Pie

  • Butthole Surfers - Who Was in My Room Last Night

  • Mathew Sweet - Girlfriend

  • Rolling Stones - Can’t You Hear Me Knockin’

  • Guns N’ Roses - Sweet Child O’ Mine

  1. Return of the Shred

  • Rage Against the Machine - Killing in the Name Of

  • Primus - John the Fisherman

  • Sword - Freya

  • Thin Lizzy - Bad Reputation

  • Aerosmtih - Last Child

  1. Relentless Riffs

  • Heart - Crazy on You

  • Stone Temple Pilots - Tripping on a Hole in a Paper Heart

  • Stray Cats - Rock This Town

  • Allman Brothers - Jessica

  • Jane’s Addiction - Stop

  1. Furious Fretwork

  • Anthrax - Madhouse

  • Living End - Carry Me Home

  • Lamb of God - Laid to Rest

  • Reverend Horton Heat - Psychobilly Freakout

  • Rush - YYZ

  1. Face-Melters

  • Avenged Sevenfold - Beast and the Harlot

  • Suicidal Tendencies - Institutionalized

  • Dick Dale - Misirlou

  • Megadeth - Hangar 18

  • Leonard Skinard - Free Bird

UPDATE: it seems the official song list has been seriously overhauled.