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