Full list of all 62 Darkest Dungeon achievements worth 1,305 gamerscore. It takes around 120-150 hours to unlock all of the achievements in the base game.
The base game contains 52 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 10 achievements worth 305 Gamerscore.
Reach the Estate
Complete a quest in the Ruins
Abandon a quest
Slay your first boss
Complete a medium quest
Complete a long quest
Start a quest with all four heroes of Resolve Level 6
Start a Darkest Dungeon quest with four heroes of resolve level 0
Complete a quest in all four regions
Complete a dungeon with all 4 heroes afflicted
Upgrade a Combat skill
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
Lock a positive Quirk in the Sanitarium
Fully upgrade the Blacksmith
Fully upgrade the Guild
Fully upgrade the Tavern
Fully upgrade the Abbey
Fully upgrade a hero's weapons and armor
Fully upgrade at least four of a hero's skills
Fully upgrade the Town
Visit the Graveyard
Raise a hero to Resolve Level 6
Raise 4 heroes to Resolve Level 6
Reach week 52
Reach week 104
Collect at least 30 heirlooms from a single quest
Kill 50 enemies with one hero
Lose your first hero
Lose your first hero to heart attack
Lose a hero to hunger
Lose a hero to Wilbur
Lose a hero to a Maggot
Lose a hero to a trap
Lose a hero to an obstacle
Lose all four heroes on a Darkest Dungeon quest
First party wipe
Lose a Legendary (Level 6) hero
Have a character survive 5 attacks at Death's Door in a single combat
Party wipe on a boss
Acquire all your Ancestor's Trinkets
Slay a Shambler
Complete the game with default difficulty options
Complete all Caretaker Goals
Complete the game on Darkest
Complete the game within 99 Weeks
Kill any boss with only one hero remaining
Complete the game on Stygian
Defeat the Brigand Vvulf
Defeat the Baron
Defeat the Viscount
Defeat the Countess
Build The Red Hook
Defeat the Fanatic
Complete The First Farmstead Quest
Defeat the Miller
Defeat the Sleeper
Get 300 Kills
Defeat the Thing From The Stars