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