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