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