Here is the full list of all 50 Icewind Dale: Enhanced Edition achievements.
Found Pale Justice, the Holy Avenger sword.
Completed Icewind Dale.
Killed Belhifet.
Acquired the Restored Blade of Aihonen.
Revisited Easthaven.
Reach 150 Hit Points.
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.
Have six party members who are good-aligned.
Visited Kuldahar.
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.
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.
Acquired the infernal Vexed Armor.
Assisted the dwarven smith Tiernon to forge an ice weapon.
Acquired the Black Swan Armor.
Acquired the Singing Blade of Aihonen.
Memorized Malavon's Rage.
Sang to the Sea Spirit Elisia.
Restored the Arboretum to its former glory.
Freed all slaves in the Wyrm's Tooth glacier.
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.