Here is the full list of all 50 Icewind Dale: Enhanced Edition achievements.
Killed Belhifet.
Complete the game with only a single party member.
Completed Icewind Dale.
Acquired the Restored Blade of Aihonen.
Reach level 30 in two classes with the same character.
Reach level 30 with a Thief or Bard.
Revisited Easthaven.
Acquired the Black Swan Armor.
Freed all slaves in the Wyrm's Tooth glacier.
Reach level 30 with a Fighter, Ranger, Paladin, Monk, or Barbarian.
Killed Joril, the leader of the Frost Giants.
Visited Wyrm's Tooth Glacier.
Killed Terikan, the Lich.
Visited Dorn's Deep.
Reach 150 Hit Points.
Killed 1,000 creatures.
Visited the Severed Hand.
Killed Yxunomei, the Marilith demoness.
Visited Dragon's Eye.
Obtain Grand Master weapon proficiency level.
Visited Kuldahar.
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.
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 Cleric, Druid, or Shaman.
Reach level 30 in three classes with the same character.
Have six party members who are good-aligned.
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.
Assisted the dwarven smith Tiernon to forge an ice weapon.
Acquired the Singing Blade of Aihonen.
Memorized Malavon's Rage.
Sang to the Sea Spirit Elisia.
Restored the Arboretum to its former glory.
Turned Malavon's Iron Golems against him.
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.