Your forces were out on a routine patrol and the undead were suddenly everywhere! Your forces were badly depleted in the conflict thus you must continue to do your job and keep the undead population under control until a solution can be found.
The city has been taken over by a hostile army. Build up your army with heavy military hardware and take back the streets and try not to destroy the city while you are at it.
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.
