Here is the full list of all 50 Planescape: Torment: Enhanced Edition achievements.
Defeated your adversary.
Absorb all 3 incarnations in the Fortress of Regrets.
Shifted Curst back to the Outlands.
Dealt with Trias the Betrayer.
Gained Vhailor as a companion.
Reach level 12 in Mage class before any other class.
Met all of Ravel's branching incarnations in Sigil.
Discovered your connection to Ignus.
Dealt with Ravel Puzzlewell.
Gained Fall-From-Grace as a companion.
Advance an attribute score to 25.
Train to become a Thief.
Join Sensates.
Gained Ignus as a companion.
Found Pharod's Vault. It smells in there.
Rescued Morte.
Discovered why Dak'kon's faith is shattered.
Gained Annah as a companion.
Recovered the Bronze Sphere.
Escaped the Lady's Maze - this time.
Drew the Lady's Gaze and got mazed.
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.
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.
Defeated the Modron Wizard.
Join Anarchists.
Join Dustmen.
Join Xaositects.
Gained Nordom as a companion.
Discovered the truth of why Morte is with you.
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.
Advanced Dak'kon's karach blade to highest honor point.
Issued Pronouncement of Two Deaths of One at Fortress of Regrets.
Restored Dak'kon's faith.
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.
Gave the Transcendent One an answer to a "meaningless question."