Here is the full list of all 27 Masquerada: Songs and Shadows achievements.
Watch the Epilogue.
Clear the final battle.
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.
Defeat the Brehon.
Win the duel.
Defeat the Ridiro Queen.
Defeat the Mangiatore.
Trigger 250 Elemental Tags.
Practice in the Training Grounds.
Listen to all of Leventhos' optional dialogues.
Defeat the Chimera.
Respec once.
Defeat the Ancient Feravaro.
Defeat the Matron.
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.
Revisit a scene.
Activate 100 Mask abilities.