Assassin's Creed Revelations Walkthrough Desmond's Journey Part 4 – Metropolis
Head on forward through the first opening. Start toward the gap and select the platform. When the Null Rays open up, create your pathway quickly. On the far side, switch to the ramp and make your way above the picture.
At the next set of rays you need to time things better. When they open up, swinging upwards, that is your signal to move. The third set is much the same, nothing too hard now. Wait for the wide opening and start moving forward. On the far side of the third set of Rays, use ramps to ascend to the ledge above. From there head left
Head into the next room and you are surrounded by rays. Head around the first set to the left to collect the Multiplayer Emblem in this section. Now weave your way to the right, going through the openings around the rays. When you come to the hortizontal ones in your path, move back a little and use the ramps and platforms to cross over it. After that, switch to platform to navigate around the gap in front of you. Head forward and go through the slim opening. You will find some rays that are switching on and off. Go through fast when they are off.
The next room is tricky. You need to drop through the Rays while they are off. Drop down as they activate and spawn a platform just above it. Repeat this all the way down.
Head through the next door on your left and cross over using the light bridge. An invisible wall will stop you from progress so backtrack and make a platform to your right in the particle stream that appeared. Use ramps to climb up then a platform or two to make it the landing opposite where you started. From there, switch to ramp and just use those to make it the next landing. You need to keep going until you reach the platform. From here use ramps and platform to reach the next landing. Now you have a tricky arrangement to deal with. The particle stream moves one direction and there are Null Rays on the route. Start on the right and make your platform and weave around the Null Rays that are in your path. Once you clear the rays, switch to ramps and use those to get the rest of the way over. From this last platform, you have a downward particle stream and on the other side a glyph.
This opens up the next area where you have an oscillating Null Ray Pattern going on. You want to start forward when you see an opening in the rays. Initially hang a little low and to the right to reach the translucent cube with the Multiplayer Emblem in it. You will likely get nailed by a Ray doing this, but you only need to do it once.
After you get the Emblem, keep high and aim for the solid platforms. The Rays stop before they hit them so take advantage of that to get a breather and to plot a course through it. Head through the opening and keep moving forward. Just head forward from here to finish out the sequence.