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