Here is the full list of all 100 Planescape: Torment and Icewind Dale: Enhanced Editions achievements worth 2,000 gamerscore.
Gave birth to Adahn through belief.
Issued Pronouncement of Two Deaths of One at Fortress of Regrets.
Gave the Transcendent One an answer to a "meaningless question."
Defeated your adversary.
Kill all 3 incarnations in Fortress of Regrets.
Absorb all 3 incarnations in the Fortress of Regrets.
Your name, at last.
Entered the Fortress of Regrets on your own.
Join Sensates.
Returned to Mebbeth and restored Unity of Rings.
Restored Dak'kon's faith.
Shifted Curst back to the Outlands.
Dealt with Trias the Betrayer.
Advanced Dak'kon's karach blade to highest honor point.
Gained Vhailor as a companion.
Reach level 12 in Mage class before any other class.
Dealt with Ravel Puzzlewell.
Met all of Ravel's branching incarnations in Sigil.
Reach Chaotic Alignment (any).
Discovered the truth of why Morte is with you.
Found Pharod's Vault. It smells in there.
Switch back to Fighter class over the course of the game.
Train to become a Thief.
Helped Nordom resolve his issues.
Defeated the Modron Wizard.
Discovered why Dak'kon's faith is shattered.
Gained Nordom as a companion.
Gained Fall-From-Grace as a companion.
Rescued Morte.
Escaped the Lady's Maze - this time.
Drew the Lady's Gaze and got mazed.
Join Dustmen.
Reach Lawful Alignment (any).
Advance an attribute score to 25.
Gained Annah as a companion.
Recovered the Bronze Sphere.
Train to become a Mage.
Gained Dak'kon as a companion.
Reach Good Alignment (any).
Escaped the Mortuary.
Complete the game on the Story Mode difficulty setting.
Obtain a Lore skill of 100 or more.
Have six party members who are evil-aligned.
Have six party members who are neutral-aligned.
Become a Fallen Paladin or a Fallen Ranger.
Sang to the Sea Spirit Elisia.
Have six party members who are good-aligned.
Complete the game on the Heart of Fury difficulty setting.
Reach level 30 with a Cleric, Druid, or Shaman.
Obtain Grand Master weapon proficiency level.
Completed Trials of the Luremaster.
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.
Killed Icasaracht, the White Dragon matriarch.
Completed Heart of Winter.
Visited the Sea of Moving Ice.
Reach level 30 with a Fighter, Ranger, Paladin, Monk, or Barbarian.
Brought a rose of ice to the bard, Murdaugh.
Acquired the Singing Blade of Aihonen.
Assisted the dwarven smith Tiernon to forge an ice weapon.
Visited Gloomfrost.
Reach level 30 with a Thief or Bard.
Discovered the true identity of the Lonelywood werewolf.
Acquired the infernal Vexed Armor.
Visited the Burial Isle.
Visited the ruined castle in the Anauroch desert.
Increase an attribute score to 25.
Found Pale Justice, the Holy Avenger sword.
Killed Belhifet.
Complete the game with only a single party member.
Completed Icewind Dale.
Acquired the Restored Blade of Aihonen.
Revisited Easthaven.
Restored the Arboretum to its former glory.
Acquired the Black Swan Armor.
Reach 150 Hit Points.
Memorized Malavon's Rage.
Turned Malavon's Iron Golems against him.
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.
Visited Dorn's Deep.
Reduce Armor Class to -15 or lower.
Visited the Severed Hand.
Killed Yxunomei, the Marilith demoness.
Killed 1,000 creatures.
Visited Dragon's Eye.
Visited Kuldahar.
Reach level 12 in Fighter class before any other class.
Reach level 12 in Thief class before any other class.
Reach Evil Alignment (any).
Maintained True Neutral Alignment until the end of the game.
Join Anarchists.
Join Xaositects.
Gained Ignus as a companion.
Discovered your connection to Ignus.
Advanced Dak'kon's karach blade to highest neutral point.
Advanced Dak'kon's karach blade to highest evil point.