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