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