The HITMAN Add-on for HITMAN World of Assassination has 13 achievements worth 195 gamerscore.
Complete World of Tomorrow.
Complete The Showstopper.
Complete Club 27.
Complete Situs Inversus.
Complete Freedom Fighters.
Reach Paris Mastery Level 20.
Reach Sapienza Mastery Level 20.
Complete A Gilded Cage.
Reach Marrakesh Mastery Level 20.
Complete Suit Only and Silent Assassin Challenges on The Icon, A House Built on Sand or Landslide.
Reach Bangkok Mastery Level 20.
Reach Colorado Mastery Level 20.
Reach Hokkaido Mastery Level 20.