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