This page contains the third part of the walkthrough for chapter 6 of Uncharted 2: Among Thieves called Desperate Times. Nathan must avoid the hostile helicopter's fire and fight regular enemies. Reach one of the rooftops to start fighting the helicopter - this can be called a boss fight because your objective is to damage the aircraft.
Jump inside the building through a hole in the floor. When passing through the corridors, you will be under constant attack not only by the helicopter outside but also by opponents inside. Use the nearby furniture as covers. When you get to the last room, go down the floor
below. During the battle with the remaining hostiles, the helicopter will shoot a series of missiles at the building where you are. This will cause it to collapse. To save yourself, jump to the next building. The game will guide you - the only thing you have to do is to jump at the right moment.
Head to the only door and climb the stairs to the top. Then jump to the next rooftop.
Get ready to fight opponents (they will be in the next building). One of the opponents will have a grenade launcher - find him and kill because this enemy can defeat Drake rather fast. Lower the wooden bridge and go to the place where the enemies stood [secret 6].
To go further, you have to jump down to the roof below. After that, you will have to participate in the aforementioned boss fight. Your objective is to destroy the helicopter. This battle can be very difficult, especially at a high difficulty level - this determines the number of shots required to destroy the helicopter. Look around the area to find ammo for this weapon. Even though there is a lot of it, you should use it wisely. The helicopter will change position quite often - you have to do the same. Remember, shooting at the rotating propellers isn't the best solution - your projectiles won't always hit the target.
The fight will end with a cut-scene. Lower another bridge and reach the other side. Then jump down below and get on the large sign (picture on the right - visible in the distance). From it, you have to jump to another roof.
Head towards another building - you will find a zipline. Use it. No one else will attack you.
Once you are on the ground, look around for a chest - climb it to grab the blue drainpipe (on the corner of the building). Climb the pipes and other elements of the environment to go over the barricade on the ground.
Jump down and walk a few steps to complete this chapter.