Here is the full list of all 50 Icewind Dale: Enhanced Edition achievements.
Have six party members who are neutral-aligned.
Have six party members who are evil-aligned.
Killed Icasaracht, the White Dragon matriarch.
Completed Heart of Winter.
Visited the Sea of Moving Ice.
Brought a rose of ice to the bard, Murdaugh.
Assisted the dwarven smith Tiernon to forge an ice weapon.
Acquired the Singing Blade of Aihonen.
Visited Gloomfrost.
Discovered the true identity of the Lonelywood werewolf.
Acquired the infernal Vexed Armor.
Visited the Burial Isle.
Completed Trials of the Luremaster.
Memorized Malavon's Rage.
Visited the ruined castle in the Anauroch desert.
Killed Belhifet.
Completed Icewind Dale.
Acquired the Restored Blade of Aihonen.
Revisited Easthaven.
Increase an attribute score to 25.
Reduce Armor Class to -15 or lower.
Found Pale Justice, the Holy Avenger sword.
Reach 150 Hit Points.
Acquired the Black Swan Armor.
Restored the Arboretum to its former glory.
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.
Visited Wyrm's Tooth Glacier.
Obtain Grand Master weapon proficiency level.
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.
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.
Turned Malavon's Iron Golems against him.