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