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