[quote name='help1']God, I have no idea what to do in the last part of "One Shot, One Kill!" The swarms all kill me before the helicopter is even 5000 M away![/quote]
Dude.
I have a perfect way to beat that part easy. *Note I found this after I got the checkpoint before the 3 heli come in to drop off more bad guys.
Once you get to the ferris wheel right when the 3 helicopter come to drop more bad guys.
From the ferris wheel. Run straight towards a white wooden fence on the right hand side.
There is an alley way there......on the left across from what looks like a stoop (front porche) there is a little "cubby" hole where one building starts and the other on starts. That looks like this. On your way to it though drop some C4 next to the fence and by the cars.
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If you crouch down in there you wont even have to shoot a single bullet. Although grenades will spawn to the right of you they wont kill you...just wait it out. Just wait there until the heli comes and then run like a

ing mad man to it. Remember to blow the C4 that you planted along the way to kill the 50 guys who will be standing there.
Now you will still have to go get Mac but your heli squad should protect you while you get his crippled ass up and back to the heli.
Easy as pie dude. Hope you understand what I am talking about...whish I could make a video for it.