The Himmelstein Add-on for HITMAN 2 has 7 achievements.
Complete The Last Yardbird in Single Player.
Get a score above 1,000,000 points on The Last Yardbird.
Eliminate the three main targets with the cannon.
Sabotage the wedding.
Complete The Last Yardbird as Silent Assassin.
Complete The Last Yardbird in Multiplayer.
Complete all The Last Yardbird Challenges.