Full list of all 56 Lords of the Fallen achievements worth 1,200 gamerscore. It takes around 35-40 hours to unlock all of the achievements in the base game.
The base game contains 46 achievements worth 1,000 Gamerscore, and there is 1 DLC packs containing 10 achievements worth 200 Gamerscore.
All achievements
Achievements they've won
Achievements they've not won
Complete the game as Rogue
Led Rhogar to victory
Unlock all spells for one class
Complete the game as Warrior
Led humans to victory
Upgrade the Health Potions
Cut off Monk's arm
Killed the First Warden with the Warden Greatsword
Complete the game as Cleric
Bring balance to both realms
Complete all Proving Grounds
Collected 20 armor sets
Defeat Lost Brothers
Kill all types of enemies at least once
Met Adyr
Entered 15 secret rooms
Find 60 audio notes
Loot all Treasure Chambers
Get 12 special weapons
Defeat the Annihilator
Showed mercy to an imprisoned monster
Collected 9 Tyrant Hearts
Kick an enemy into his death
Complete all Infinite Voids
Defeat the Guardian
Purified the sword of the unlucky grave robber
Defeat the Beast
Let a boss destroy the statue during fight
Met Antanas
Collected 25 Human Skulls
Defeat the Champion
Throw a corpse down the bottomless pit in Catacombs
Retrieve lost experience by collecting your ghost
Defeat the Infiltrator
Collect all weapon types
Meet the Blacksmith
Entered the Rhogar realm
Defeat the Worshiper
Defeat a boss with at least 20000 unspent experience
Buy your first Attribute or Spell Point
Defeat the Commander
Die for the first time
Found the Gauntlet
Defeat any Boss without taking damage
Defeat First Warden
Find a note that someone left behind
Find all eight audio notes in the Ancient Labyrinth
Just in case you picked up a shielding map
Manipulated the Keeper's magic schools
Plundered all four resting places
Defeat the Keeper
Chose a perfectly fitting armor
Killed 40 ghosts in the Ancient Labyrinth
Met a strange person in a strange place
Defeated the Judge with a weapon dropped by the Keeper
Defeated the Keeper after changing his initial magic school to the fire type