The World is Not Enough Walkthrough:
City of Walkways
This is the 'Destroy the Helicopter' level. When you start, immediately shoot the guy in front of you. There's armor to the left. Shoot the waves of guys that come in until they stop. Now go out the door.
There'll be 2 guys right in front of you. Follow dock, get rocket, shoot helecopter. By car are 3 more rockets. Now comes the helecopter with gears. Shoot it, go along tube.
Go in the house, armor in back and wrench. Go out lower door armor on deck to right
Go in lower house, get flare gun. Back up, follow walkways
In the final house, hit lever with wrench. Now shoot flare into gas to end level.
The World is Not Enough Walkthrough