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