This page of the guide has a walkthrough for the second part of chapter 20 of Uncharted 2: Among Thieves called Cat and Mouse. The hero must avoid the hostile tank. The chapter ends with something similar to a boss fight.
Nate avoids getting driven over by the tank. Our character survives but Tenzin has disappeared somewhere. You are left alone. The road goes along the cliff. Walk a few meters [secret 2] and defeat two enemies hiding around the corner.
Kill more opponents standing in your way. They shouldn't cause you any problems. The tank will appear at the end of the path. Run towards it and then turn right a few meters away from the tank.
Walk between the brick houses (you will encounter two mercenaries) and reach the cliff.
Jump down and go along the snow-covered shelf. Then, proceed forward by sticking to the wall.
Soon, you will reach the roofs [secret 3]. Jump on them and get back on the ground.
The tank will appear behind you. This part isn't the same as the one a few minutes earlier. Rotate the camera and quickly climb the nearby stairs.
Reach the house located at the top. Run inside it, get rid of opponents and get on the roof. You now have to destroy the tank.
Kill the enemy equipped with a rocket launcher and pick up his weapon. Then aim at the vehicle and shoot a rocket. You now have to move along the road by jumping from one roof to another. Locate another enemy with an RPG in the distance. Pick up a FAL rifle and kill him - this weapon is very helpful in eliminating enemies from afar.
To get to the place where he was, jump to the ground and quickly run up to the next building. Kill two enemies inside and another at the back of the building. Climb the stairs to the roof and pick up the rocket launcher. Shoot the tank and go to the next buildings - use FAL to kill the enemy located farther away. You have to jump on a few rooftops [secret 4].
Reach the place where the last enemy with a rocket launcher stood. Pick up his weapon and shoot the tank. If all your previous attacks hit the target, you will only need one more shot. If you need ammo, you can go across the street. You can get there by using the zipline hanging over the street. Before you get there, kill the enemies located at the bottom.
You should find enough rockets to destroy the vehicle. The number of required shots depends on how many times you have managed to hit it. The fourth rocket will destroy the tank.