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.
Turned Malavon's Iron Golems against him.
Acquired the Black Swan Armor.
Restored the Arboretum to its former glory.
Found Pale Justice, the Holy Avenger sword.
Obtain a Lore skill of 100 or more.
Freed all slaves in the Wyrm's Tooth glacier.
Killed Joril, the leader of the Frost Giants.
Reduce Armor Class to -15 or lower.
Sang to the Sea Spirit Elisia.
Have six party members who are evil-aligned.
Visited Wyrm's Tooth Glacier.
Killed Terikan, the Lich.
Reach 150 Hit Points.
Obtain Grand Master weapon proficiency level.
Visited Dorn's Deep.
Killed 1,000 creatures.
Visited the Severed Hand.
Killed Yxunomei, the Marilith demoness.
Increase an attribute score to 25.
Visited Dragon's Eye.
Become a Fallen Paladin or a Fallen Ranger.
Visited Kuldahar.
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.
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.
Acquired the infernal Vexed Armor.
Assisted the dwarven smith Tiernon to forge an ice weapon.
Acquired the Singing Blade of Aihonen.
Memorized Malavon's Rage.
Discovered the true identity of the Lonelywood werewolf.
Brought a rose of ice to the bard, Murdaugh.
Visited the Burial Isle.
Visited Gloomfrost.
Visited the Sea of Moving Ice.
Visited the ruined castle in the Anauroch desert.
Completed Trials of the Luremaster.
Completed Heart of Winter.
Killed Icasaracht, the White Dragon matriarch.