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