Full Synchronisation Requirement - Beat Yusuf to Topkapi Palace
You’ll start right next to Yusuf on top of the Hippodrome. Talk to him to hear about a Byzantine plot on the life of Suleiman, the Sultan’s nephew. First off, you’ll need to head to Topkapi Palace. Follow the group of four assassins ahead of you for an easy route there, and as Yusuf starts behind you, you should have no trouble beating him there for the optional objective requirement. It’s actually faster to take to the streets and sprint to the palace wall, so if you’re having trouble that could potentially allow you to get there even before the assassin group.
When you reach the wall, you’ll have to leap of faith down into a hay cart before knocking out a few of those frustrating minstrels that have populated the previous titles in the Assassin’s Creed series. Feel free to enjoy yourself, but when you’re done with the first group of minstrels, you’ll need to carry one to the hay cart and throw his unconscious body in. Climb over the wall and do the same with the second group, walk slowly carrying the body after the other two assassins to avoid being spotted by the oblivious Janissaries. Stick near to the outside wall to avoid patrols and then scale the wall to reach the inner courtyard for the third group of minstrels. This time Ezio will don their costume and so begins one of the most entertaining sequences in the game.
Approach the gate guards and press any one of the face buttons on the controller to begin to play the lute and serenade them. After a couple of short musical rhymes, most of which reference the events of previous titles starring Ezio, the guards will lose patience and let you through into the party. Once inside, make your way to the first group of guests, and use Eagle Sense to examine each until you find the Templar assassin. Stand in the marker and play a song to distract the crowd while the other assassins take care of them. Repeat this again and then head with Yusuf into the next courtyard. This time, follow Suleiman around, and try to quickly examine everyone you can to identify potential Templars. Again, your job is to distract the crowds with your playing while Yusuf and the other assassins get the job done. At the end, Yusuf will be discovered in the act of hiding a body and the Templars will make their move. With Yusuf and the other assassins caught up fighting, Ezio will break his lute and you’ll have to quickly sprint and assassinate the last of the Templar saboteurs to finish the Memory.