Here is the full list of all 12 AC/DC Live: Rock Band Track Pack achievements worth 250 gamerscore.
5-Starred "T.N.T." on Bass or Drums.
4-Starred or better on a song after failing out and choosing "Retry".
Enter any mode with a four player band.
5-Star all the songs on AC/DC LIVE: Rock Band on any difficulty.
Play through every song on AC/DC LIVE: Rock Band in one session.
Score 100% notes hit during a Guitar Solo on Expert.
Score 100% notes hit as a drummer on Expert.
Score 100% notes hit as a bassist, upstrums only, on Expert.
Score a 100% rating as a vocalist on Expert.
5-Star "You Shook Me All Night Long" on Vocals or Guitar.
5-Star "Dirty Deeds Done Dirt Cheap" on Drums or Vocals.
5-Star on "Thunderstruck" with Guitar or Drums.