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