Call of Duty 4: Modern Warfare/Ultimatum

Objectives

 * Locate SSgt. Griggs
 * Untie SSgt. Griggs
 * Destroy the power transmission tower
 * Plant C4 on the tower legs [2 Remaining]
 * Get to a safe distance
 * Regroup with 2nd Squad

Rescue SSgt. Griggs
When you start, follow the marker up the road, you will encounter a truck coming towards you, take out the driver and any passengers then continue on, you will find quite a few troops with torches, take out one or two then prone just to be safe, your team will kill the others.

A helicopter will go overhead, just ignore it and run to the tower, press the Use key to plant both of the C4s then move fairly far away and watch the tower tumble. Wait as your team cut a hole in the barbed wire then continue on to meet 2nd Squad

Regroup with 2nd Squad
After you have gone through the barbed wire, jump over the broken down wall, to your left, there will be some weapons and flashbangs, you may want to pick up the Dragunov and swap it for the G36C but it is not necessary.

Now go forward into the building, go outside and make your way into the garage to the right. Hide behind the car, even though this is not normally advised, it is a very good spot as the enemies are mainly aiming at the others and any grenades will not reach. Obviously if it starts burning, run away. After killing most of the enemies, go forward and take cover in the small room in front of the garage. Camp in here until you are told the area is clear. In the building where most of the enemies were, there is some intelligence so pick that up them get some ammunition off dead enemies move on.