Here is the full list of all 50 Icewind Dale: Enhanced Edition achievements.
Killed Belhifet.
Completed Icewind Dale.
Acquired the Restored Blade of Aihonen.
Revisited Easthaven.
Killed Icasaracht, the White Dragon matriarch.
Completed Heart of Winter.
Visited the Sea of Moving Ice.
Completed Trials of the Luremaster.
Visited the ruined castle in the Anauroch desert.
Discovered the true identity of the Lonelywood werewolf.
Brought a rose of ice to the bard, Murdaugh.
Assisted the dwarven smith Tiernon to forge an ice weapon.
Visited Gloomfrost.
Visited the Burial Isle.
Restored the Arboretum to its former glory.
Acquired the Black Swan Armor.
Killed Joril, the leader of the Frost Giants.
Freed all slaves in the Wyrm's Tooth glacier.
Visited Wyrm's Tooth Glacier.
Killed Terikan, the Lich.
Visited Dorn's Deep.
Killed 1,000 creatures.
Visited the Severed Hand.
Killed Yxunomei, the Marilith demoness.
Visited Dragon's Eye.
Visited Kuldahar.
Have six party members who are good-aligned.
Obtain Grand Master weapon proficiency level.
Complete the game with only a single party member.
Complete the game on the Heart of Fury difficulty setting.
Complete the game on the Story Mode difficulty setting.
Increase an attribute score to 25.
Reduce Armor Class to -15 or lower.
Reach 150 Hit Points.
Obtain a Lore skill of 100 or more.
Become a Fallen Paladin or a Fallen Ranger.
Reach level 30 with a Mage or Sorcerer.
Reach level 30 with a Thief or Bard.
Reach level 30 with a Fighter, Ranger, Paladin, Monk, or Barbarian.
Reach level 30 with a Cleric, Druid, or Shaman.
Reach level 30 in two classes with the same character.
Reach level 30 in three classes with the same character.
Have six party members who are neutral-aligned.
Have six party members who are evil-aligned.
Found Pale Justice, the Holy Avenger sword.
Acquired the infernal Vexed Armor.
Acquired the Singing Blade of Aihonen.
Memorized Malavon's Rage.
Sang to the Sea Spirit Elisia.
Turned Malavon's Iron Golems against him.