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