Full list of all 120 Darkest Dungeon achievements. It takes around 200 hours to unlock all of the achievements in the base game on Windows.
The base game contains 69 achievements, and there are 3 DLC packs containing 51 achievements.
Party wipe on a boss
Kill any boss with a party of four afflicted heroes
Complete a dungeon with all 4 heroes afflicted
Lose a hero to a trap
Lose all four heroes on a Darkest Dungeon quest
Lose a hero to a Maggot
Complete all Caretaker Goals
Lose a hero to an obstacle
Lose a hero to hunger
Kill all bosses
Have a character survive 5 attacks at Death's Door in a single combat
Start a Darkest Dungeon quest with four heroes of resolve level 0
Kill any boss with only one hero remaining
Fully upgrade the Town
Fully upgrade the Abbey
Kill a Squiffy Ghast with a Jester
First party wipe
Lose your first hero to heart attack
Complete the game with default difficulty options
Complete the game
Complete the game within 99 Weeks
Complete the game on Stygian
Complete the game on Radiant
Dismas and Reynauld Made it to the final Darkest Dungeon Quest
Fully upgrade the Tavern
Acquire all your Ancestor's Trinkets
Fully upgrade the Blacksmith
Fully upgrade the Guild
Kill Squiffy Ghast, Swine Skiver, Bone Bearer and Hateful Virago
Reach week 104
Start a quest with all four heroes of Resolve Level 6
Have one of each class on your roster
Defeat the brigand Vvulf
Complete a long quest
Raise 4 heroes to Resolve Level 6
Reach week 52
Slay 1000 enemies
Lose a Legendary (Level 6) hero
Kill the Shrieker
Fully upgrade a hero's weapons and armor
Fully upgrade at least four of a hero's skills
Raise a hero to Resolve Level 6
Defeat 100 Eldritch enemies
Walk 500 steps with one hero
Complete 25 quests
Defeat 100 Unholy enemies
Kill 50 enemies with one hero
Treat a hero in the Tavern
Defeat 100 Human enemies
Slay a Shambler
Abandon a quest
Defeat 100 Beast enemies
Lose your first hero
Lose a hero to Wilbur
Upgrade a Combat skill
Complete 10 quests
Remove a Quirk in the Sanitarium
Collect at least 20,000 gold from a single quest
Slay your first boss
Complete a medium quest
Learn a new Camping skill
Complete a quest in all four regions
Treat a hero in the Abbey
Dismiss your first hero
Lock a positive Quirk in the Sanitarium
Complete a quest
Collect at least 30 heirlooms from a single quest
Visit the Graveyard
Reach the Estate
Kill an ally while under the Curse
Lose a hero to Wasting Away from the Curse
Have your entire roster affected by the crimson curse
Build The Red Hook
Defeat the Countess
Defeat the Viscount
Rescue someone
Defeat the Fanatic
Collect your first Trinket Set
Defeat the Baron
Contract the Crimson Curse via contagion
Collect The Invitation
Build your first district building
Get infected by the Crimson Curse
Recruit a flagellant
Collect All of Color of Madness Trinkets
Defeat the Sleeper With 2 Afflicted, 2 Virtuous Heroes
Reach Death's Door From Farmhand's Riposte
Use The Shard Dust Provision
Lose a Hero Equipped with the Coat of Many Colors
Lose a Hero Equipped with the Miller's Pipe
Build the Windmill
Fight Every Wondering Boss in Endless
Get 200 Kills
Get 300 Kills
Kill the Sleeper's Herald With a Riposte
All 4 Heroes Dodge the Miller's Reaping
Earn 200 Shards In One Endless Run
Get 100 Kills
Defeat the Sleeper
Acquire Mildred's Locket Trinket
Gain the Refracted Affliction
Defeat the Miller
Defeat the Thing From The Stars
Complete The First Farmstead Quest
Win 100 matches in the Butcher's Circus
Kill 600 enemies in the Butcher's Circus
Cause 150 heart attacks in the Butcher's Circus
Reach the max Prestige level in the Butcher's Circus
Have a hero survive 5 death's door checks in a single match
Kill each hero class in the Butcher's Circus
Have a single hero survive 4 heart attacks in a single match
Win a match in the dueling grounds
Win a match using ONLY stress against your enemies
Kill an enemy hero in the first round of a match
Daze 10 enemies in the Butcher's Circus
Cause an enemy hero to have a heart attack
Win a match without using any trinkets
Win any 10 matches without losing any heroes
Have a single hero deal deathblows to 4 enemies in a single match
Play your first match in the Butcher's Circus