Assassin's Creed 2 Brotherhood Episode 9: Den of Thieves

"After meeting with the Assassins at the Tiber Island headquarters, Ezio Auditore decided to break into the Castel Sant'Angelo, in an attempt to assassinate Cesare and Rodrigo Borgia."
"After Ezio Auditore reached Caterina Sforza's cell, he learned that the only key was in the possession of Lucrezia Borgia."
"Ezio Auditore freed Caterina Sforza from her cell in the Castel Sant'Angelo."
"Ezio Auditore arrived at the Tiber Island Hideout where he found La Volpe and Caterina Sforza. Niccolò Machiavelli then arrived and Ezio told them all about the events that took place at the Castel Sant'Angelo.
"Ezio proposed that they recruit the enemies of the state into the Assassin Brotherhood, stating that they would arm those who had been disarmed by the Borgia."
"After following a mysterious voice, Ezio Auditore met with his old friend Leonardo da Vinci."
"In order to aid with the destruction of his war machines, Leonardo da Vinci supplied Ezio Auditore da Firenze with a list detailing the names of the Templars overseeing their construction."
"In pursuit of the first of Leonardo da Vinci's war machines, the machine gun, Ezio Auditore departed from Rome and journeyed through the countryside to the Alban Hills."
"Ezio Auditore met up with his fellow Assassins at the Roman Assassin headquarters to form a plan against the Borgia."