The levels starts on the stage, behind the curtain. After Carl's announcement, the curtain will open and you'll find yourself standing in front of the crowd. Your task is to break the chains and walk on the street.
When you do that, be aware of nearby building, where a reflector with soldiers is placed. If the camera changes to the one from the picture, you'll be attacked with the rifle. Avoid being hurt by hiding behind the wall (you will escape) or climb the roof and get rid of the threat.
Destroy some nets blocking the road to move further. A few blows and the road will stand open (there will be two nets, the second one with lamps in front).
Get to the strange tunnel and pass it by catching the metal piece, situated above the hole in the ground.
You'll enter the next 'district'. You will be attacked by the police officers in the cars (only when the camera changes like in the picture). Avoid being hurt by chasing the car and destroy it, or simply by running away.
Not moving, armor-plated vehicles will be a bigger threat for you (similar camera view). They can attack with strong gun, which can easily kill you. If you find yourself in the range of fire, you'll have two choices (to them QUICKLY): retreat and hide behind the wall, or run near the vehicle and destroy it (a little bit harder task). I marked theirs locations on the map with 'X'.
In order to move further, you must go under the bridge, but unfortunately there's a bus there. You'll be forced to throw it away, but the guns' shoots will make that impossible for a while (enemies attacks from places situated near three reflectors [circles on the map]).
You'll be force to destroy the guns, otherwise you won't move ahead. First is located nearby, on the one-storied building's roof. The second one is situated on the other side of the street, on the bigger building's roof.
To get to the third one, jump above the street from the place, where you have destroyed the second reflector (picture on the left).
After rifles' destruction, throw the bus away and go under the bridge.
Now, run straight ahead through quite long street. The camera view will change three times, showing you the heavy cannons' locations. Don't bother them, just quickly run ahead (if you'll stop running, you might get shoot). Short cutscene will start at the road's end...
...Ann will occur in it. You will take her in the hand and together...
...you'll climb up on the skyscraper. The stage will end during climbing.