You are a part of US Combat operation. Complete the operation by shooting targets down. You got limited time to complete the entire operation, otherwise you fail.
The world oil supply is low and the battle for resources is about to begin. A new oil rich desert has been discovered, and it is your duty to claim it for your country.
Your chopper crash-landed at an urban war zone. Use your machine gun to get through the hostile enemy soldiers while moving closer to the extraction point.
You're on a rescue mission. Get all your wounded soldiers out of the enemy territory. Just watch out for soldiers that have already transformed into zombies.
