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