What happens when you get the feathers in AC brotherhood?

In "Assassin's Creed: Brotherhood," collecting all 100 feathers scattered throughout Rome unlocks the achievement "Feather Collector." Once you've gathered them all, you return to the Auditore family home in Monteriggioni, where you can complete a special cutscene. This reveals a poignant moment involving Ezio and his family's legacy, adding depth to the story and enhancing the emotional connection to the game’s narrative. Additionally, you receive an increase in your overall completion percentage.