The The Crimson Court Add-on for Darkest Dungeon has 15 achievements.
Defeat the Countess
Build The Red Hook
Defeat the Viscount
Collect your first Trinket Set
Kill an ally while under the Curse
Defeat the Baron
Have your entire roster affected by the crimson curse
Defeat the Fanatic
Build your first district building
Collect The Invitation
Contract the Crimson Curse via contagion
Rescue someone
Lose a hero to Wasting Away from the Curse
Get infected by the Crimson Curse
Recruit a flagellant