The Dunwall City Trials Add-on for Dishonored has 10 achievements.
Finish Mystery Foe without using any active supernatural powers
Find Emily's doll hidden in each of the 10 challenges
Complete all Normal and Expert challenges with a 3-Stars rating
Get to Wave 13 in Back Alley Brawl killing all combatants personally
Complete Train Runner before the train arrives at the station
Find all of the collectable figurines in Burglar on Expert
Perform a drop assassination of at least 150 meters in the Kill Cascade challenge
Complete Assassin's Run with 100% accuracy using only head shots
In Bonfires, perform all the special combination jumps in 1 round
Finish Chain Kill or Bend Time Massacre without failing any wave, including bonuses