Harmonix is not the best when it comes to Achievements. I don't know if they just don't care or if they try to make them accessible (unlike GHIII I mean Jesus) but they certainly won't be shaking any ground.

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We Salute You! --- 20
5-Star all the songs on AC/DC LIVE: Rock Band Track Pack on any difficulty.

ALLLLLLLL Night Long! --- 30
Play through every song on AC/DC LIVE in one session.

Fifteen Million Fingers --- 30
Score 100% notes hit during a Guitar Solo on Expert.

Let There Be DRUMS! --- 25
Score 100% notes hit as a drummer on Expert.

Oi! Oi! Oi! --- 20
Score 100% notes hit as a bassist, upstrums only, on Expert.

Number One With a Bullet --- 25
Score a 100% rating as a vocalist on Expert.

Yeah, Yeah You Shook Me! --- 20
5-Star "You Shook Me All Night Long" on Vocals or Guitar.

Done Dirt Cheap --- 20
5-Star "Dirty Deeds Done Dirt Cheap" on Drums or Vocals.

Broke the Limit, We Hit the Town --- 20
5-Star on "Thunderstruck" with Guitar or Drums.

Watch Me Explode! --- 20
5-Star "T.N.T." on Bass or Drums.

Secret Achievement --- 10
Continue playing to unlock this secret achievement.

Secret Achievement --- 10
Continue playing to unlock this secret achievement.

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Pretty standard stuff.