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