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