Here is the full list of all 27 Masquerada: Songs and Shadows achievements.
Watch the Epilogue.
Clear the final battle.
Activate 100 Mask abilities.
Collect all the codices.
Listen to all of Vasco's optional dialogues.
Listen to all of Kalden's optional dialogues.
Listen to all of Amadea's optional dialogues.
Listen to all of Tiziana's optional dialogues.
Collect all inks and runes.
Revisit a scene.
Defeat the Brehon.
Trigger 250 Elemental Tags.
Respec once.
Practice in the Training Grounds.
Win the duel.
Defeat the Ridiro Queen.
Defeat the Mangiatore.
Listen to all of Leventhos' optional dialogues.
Defeat the Chimera.
Fully upgrade a skill.
Defeat the Ancient Feravaro.
Defeat the Matron.
Defeat the Saltbreather.
Defeat the Antiquarian.
Defeat the Triplets.
Defeat the Greater Bolgia.
Complete the Prologue