Here is the full list of all 50 Planescape: Torment: Enhanced Edition achievements.
Defeated your adversary.
Gave the Transcendent One an answer to a "meaningless question."
Issued Pronouncement of Two Deaths of One at Fortress of Regrets.
Absorb all 3 incarnations in the Fortress of Regrets.
Advanced Dak'kon's karach blade to highest honor point.
Escaped the Lady's Maze - this time.
Drew the Lady's Gaze and got mazed.
Gained Nordom as a companion.
Defeated the Modron Wizard.
Shifted Curst back to the Outlands.
Dealt with Trias the Betrayer.
Advance an attribute score to 25.
Gained Vhailor as a companion.
Reach level 12 in Mage class before any other class.
Met all of Ravel's branching incarnations in Sigil.
Dealt with Ravel Puzzlewell.
Restored Dak'kon's faith.
Discovered why Dak'kon's faith is shattered.
Join Sensates.
Reach Good Alignment (any).
Train to become a Thief.
Switch back to Fighter class over the course of the game.
Rescued Morte.
Gained Fall-From-Grace as a companion.
Found Pharod's Vault. It smells in there.
Join Dustmen.
Gained Annah as a companion.
Recovered the Bronze Sphere.
Train to become a Mage.
Gained Dak'kon as a companion.
Escaped the Mortuary.
Reach level 12 in Fighter class before any other class.
Reach level 12 in Thief class before any other class.
Reach Chaotic Alignment (any).
Reach Lawful Alignment (any).
Reach Evil Alignment (any).
Maintained True Neutral Alignment until the end of the game.
Gave birth to Adahn through belief.
Join Anarchists.
Join Xaositects.
Gained Ignus as a companion.
Discovered the truth of why Morte is with you.
Discovered your connection to Ignus.
Helped Nordom resolve his issues.
Advanced Dak'kon's karach blade to highest neutral point.
Advanced Dak'kon's karach blade to highest evil point.
Returned to Mebbeth and restored Unity of Rings.
Your name, at last.
Entered the Fortress of Regrets on your own.
Kill all 3 incarnations in Fortress of Regrets.