Assassin's Creed Revelations Walkthrough Part 22 – Signs and Symbols Part 1, Galata Tower
Head once again for the Sofia Memory Marker. Climb to the top of the Tower shown under the marker. Up there, turn on Eagle Sense. Look down on the Hagia Sophia itself and the second symbol none too far from the entrance.
Before you go to collect the book, be sure to send your Assassins off on mission and clear out the bank. You are to once again leave the streets of Constantinople. Once you are ready, climb up the Hagia Sophia. Ezio will find one of the books he is looking for and learn that one of the keys rest hidden inside Galata Tower. Use the tunnels to get over there quickly. Climb to the top of Galata Tower and go in through the marked door.
Galata Tower
Full Synchronization requires that you complete this maze in Six Minutes.
Pulling off the Full Synchronization can take some practice so think of the first run through as a chance to get familiar with the layout. You can pull it off the first time but that means no mistakes early on or later.
Descend the stairs and lead to the left, onto the platform with the rocks on it. This will break, throwing Ezio and its payload down a slope. Move around to dodge the obstacles that come at you. At the bottom you want to climb up, shimmy right to get on the other side of the ruined mechanism and jump over to the large archway behind you. Head to the right then ride the zipline to the door below.
Cross through the short tunnel and immediately turn to your left when you come out of it. Climb up the wall and then Long Jump from the Hanging Lantern to the other side of the room. Move to the right and climb upwards then to the right. When you stop moving, jump away from the wall and run across the beams to the platform. Turn left and head out of the room.
Keep going to the left, jump across to the Waterwheel and head to the left as best you can on that. Now jump to the other side of the room and start to the right. You must begin by going up the nearby wall then more climbing to the right. Just keep moving forward from the beam tot he Zipline and make for the wall in front of you.
Climb the wall quickly then head right. Keep going up and to the right to reach the next Zipline. Just keep running forward to reach the next Zipline. You will hit a Checkpoint when you get off this one. Just climb the wall in front of you and dash forward. Again, go up the wall then make for the right. After the bit of wooden structure crumbles you will hit another checkpoint and have another Zipline to ride.
At the bottom go left and perform a Leap of Faith from the nearby perch. You will land in the water. Swim forward and climb onto the nearby platform. Head to the left, long jump to the next platform and work your way upwards. There is a long series of jumps in here. Followed by some hair raising Ziplining.
When you encounter the Zipline that collapses on you, you are nearly there. Climb up quickly and head into the next room. There are three valuable chest here but if you have less than minute left for Full Synchronization and this is a Synch run, then forsake them. Look to the right wall with Eagle Sense and look at the door more on the left. Move Ezio forward and open it up. Dash forward and collect the key sitting there.