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