Call of Duty 4: Modern Warfare/Death from Above

Death from above is a different level because instead of being a troop on the ground, you are in an AC-130 Gunship, assisting your squad-mates.

Provide AC-130 Gunship Support for Friendly Ground Units
First you will see a church, watch out for this, if you fire on it or even some shrapnel hits it. You should use the 105mm Cannon to take out the vehicles then switch to the 40mm cannon and take out any enemy groups you see, watch out for flashing people as they are friendlies. Just keep on killing any enemy you see until you hear about a truck on the highway. Wait until the truck passes, do NOT attack it.

You will now go to a village, you will see a few men and a truck near the trees, shoot then with the 105mm Cannon. Then switch to the 40mm Cannon and attack the people on the rooftops of buildings. Keep on killing anyone you see, but watch out when your men come through, you may want to switch to the 25mm gun if there is anyone to finish off.

You will eventually go to the Junkyard, may enemies in big groups will be around, many come from a U-Spared building, so look back there sometimes. Switch between the 105 and 40 mm guns as the 25mm is fairly useless against big enemy groups, if a few slip away, then use that to get them then go back to the big guns. Captain Price will be on foot so watch out for his squad. Two helicopters will arrive, so cover them and then the mission will be complete.