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