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.
Complete the game with default difficulty options
Complete the game on Darkest
Complete the game on Stygian
Kill any boss with only one hero remaining
Acquire all your Ancestor's Trinkets
Fully upgrade the Town
Reach week 104
Party wipe on a boss
Slay a Shambler
Lose a hero to a Maggot
Lose a hero to a trap
Complete the game within 99 Weeks
Lose a hero to hunger
Fully upgrade the Abbey
Fully upgrade the Tavern
Fully upgrade the Guild
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
Reach week 52
Fully upgrade the Blacksmith
Complete all Caretaker Goals
Fully upgrade at least four of a hero's skills
Lock a positive Quirk in the Sanitarium
Complete a dungeon with all 4 heroes afflicted
Lose a hero to an obstacle
First party wipe
Defeat the Brigand Vvulf
Start a quest with all four heroes of Resolve Level 6
Lose a Legendary (Level 6) hero
Lose your first hero to heart attack
Fully upgrade a hero's weapons and armor
Raise 4 heroes to Resolve Level 6
Raise a hero to Resolve Level 6
Complete a long quest
Slay your first boss
Collect at least 30 heirlooms from a single quest
Dismiss your first hero
Abandon a quest
Lose a hero to Wilbur
Lose your first hero
Kill 50 enemies with one hero
Complete a medium quest
Learn a new Camping skill
Upgrade a Combat skill
Complete a quest in all four regions
Remove a Quirk in the Sanitarium
Treat a hero in the Tavern
Treat a hero in the Abbey
Complete a quest in the Ruins
Visit the Graveyard
Reach the Estate
Defeat the Countess
Defeat the Viscount
Build The Red Hook
Defeat the Baron
Defeat the Fanatic
Complete The First Farmstead Quest
Defeat the Miller
Defeat the Sleeper
Get 300 Kills
Defeat the Thing From The Stars