Here is the full list of all 50 Icewind Dale: Enhanced Edition achievements.
Complete the game with only a single party member.
Complete the game on the Story Mode difficulty setting.
Reach level 30 in three classes with the same character.
Reach level 30 in two classes with the same character.
Reach level 30 with a Mage or Sorcerer.
Obtain a Lore skill of 100 or more.
Acquired the Singing Blade of Aihonen.
Discovered the true identity of the Lonelywood werewolf.
Complete the game on the Heart of Fury difficulty setting.
Acquired the Restored Blade of Aihonen.
Reach level 30 with a Fighter, Ranger, Paladin, Monk, or Barbarian.
Reach level 30 with a Cleric, Druid, or Shaman.
Sang to the Sea Spirit Elisia.
Reach level 30 with a Thief or Bard.
Killed Icasaracht, the White Dragon matriarch.
Completed Heart of Winter.
Visited the Sea of Moving Ice.
Reduce Armor Class to -15 or lower.
Brought a rose of ice to the bard, Murdaugh.
Assisted the dwarven smith Tiernon to forge an ice weapon.
Visited Gloomfrost.
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.
Revisited Easthaven.
Acquired the Black Swan Armor.
Turned Malavon's Iron Golems against him.
Restored the Arboretum to its former glory.
Found Pale Justice, the Holy Avenger sword.
Freed all slaves in the Wyrm's Tooth glacier.
Killed Joril, the leader of the Frost Giants.
Visited Wyrm's Tooth Glacier.
Killed Terikan, the Lich.
Obtain Grand Master weapon proficiency level.
Visited Dorn's Deep.
Killed 1,000 creatures.
Visited the Severed Hand.
Killed Yxunomei, the Marilith demoness.
Reach 150 Hit Points.
Visited Dragon's Eye.
Become a Fallen Paladin or a Fallen Ranger.
Increase an attribute score to 25.
Have six party members who are evil-aligned.
Have six party members who are neutral-aligned.
Visited Kuldahar.
Have six party members who are good-aligned.