Full list of all 12 Rock Band Track Pack 2 achievements worth 250 gamerscore. It takes around 2-3 hours to unlock all of the achievements on Xbox 360.
5-Star "Monkey Gone to Heaven" using Bass or Vocals on any difficulty.
5-Star "El Scorcho" using Vocals or Guitar on any difficulty.
5-Star "This Ain't a Scene..." by Fall Out Boy using Guitar or Drums on any difficulty.
5-Star "You've Got Another Thing Comin'" by Judas Priest using Guitar or Bass on any difficulty.
5-Star all songs in Solo Tour on any difficulty using any instrument
Score 100% notes hit as bassist, up-strums only, on Expert.
Score 100% notes hit as a guitarist on Expert.
Score a 100% rating as a vocalist on Expert.
Score 100% notes hit as a drummer on Expert.
5-Star "Call Me" by Blondie using Vocals or Bass on any difficulty
5-Star "Girl U Want" by Devo using Guitar or Drums on any difficulty.
5-Star "Message in a Bottle" by The Police using Guitar or Vocals on any difficulty.