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