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