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