Here is the full list of all 50 Icewind Dale: Enhanced Edition achievements.
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.
Brought a rose of ice to the bard, Murdaugh.
Acquired the Singing Blade of Aihonen.
Assisted the dwarven smith Tiernon to forge an ice weapon.
Visited Gloomfrost.
Discovered the true identity of the Lonelywood werewolf.
Acquired the infernal Vexed Armor.
Increase an attribute score to 25.
Visited the Burial Isle.
Completed Icewind Dale.
Killed Belhifet.
Acquired the Restored Blade of Aihonen.
Revisited Easthaven.
Acquired the Black Swan Armor.
Restored the Arboretum to its former glory.
Turned Malavon's Iron Golems against him.
Found Pale Justice, the Holy Avenger sword.
Freed all slaves in the Wyrm's Tooth glacier.
Killed Joril, the leader of the Frost Giants.
Reduce Armor Class to -15 or lower.
Visited Wyrm's Tooth Glacier.
Killed Terikan, the Lich.
Obtain Grand Master weapon proficiency level.
Reach 150 Hit Points.
Visited Dorn's Deep.
Killed 1,000 creatures.
Visited the Severed Hand.
Killed Yxunomei, the Marilith demoness.
Obtain a Lore skill of 100 or more.
Visited Dragon's Eye.
Visited Kuldahar.
Sang to the Sea Spirit Elisia.
Have six party members who are good-aligned.
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.
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.
Memorized Malavon's Rage.