After the system verifies your permissions, it runs the destroy command. This command deletes all file references, shelvesets, and pending changes. The actual destruction of files, which is a permanent deletion, happens the next time that the content that is no longer referenced by Team Foundation Server is cleaned up. You can also specify the /startcleanup option to clean up the files immediately after tf destroy runs.
If you run tf destroy without specifying /i and /preview, the system displays a console Yes or No prompt for each filespec value. Otherwise, you can specify Yes to all. If you do not specify /keephistory, you are prompted by an interactive text that warns of pending changes, if they exist. The interactive text points to /preview if you want more information about the changes. If you specify /keephistory, you are also prompted by Yes, No, or All text. If you select Yes or All, the destruction process starts, and the server paths to the destroyed items appear in the Command Prompt window.
In these harsh, unforgiving battlefields, players are not bound by one commander. They may choose to play as and be loyal to humans or aliens. One could be your brother, your friend; the other is a little green man from outer space. But while you may not want to destroy all humans, the alien army is very appealing. Aliens have access to four non-vehicular units: Trooper, Robojet, Tekno, and Psionic. Compared with the five humans offer, this might not sound too appealing. But Robojets are equipped with jet packs that let them travel anywhere (over ice, water, etc.) in the stage. Psionic units have the power to influence opposing forces and make them switch sides.
If you thought that aliens' advanced technology would mean they had found a superior source of energy, think again. In Command and Destroy, unit production costs money. The only way to make money is by creating the proper, oil-snatching units. Humans do this by building a refinery, which spawns one small vehicle called a Driller. Guide the Driller to the nearest oil site (indicated on screen by a large black puddle) and the game will take over from there. Drillers can't hold much oil, which means it will have to make several trips back and forth between the refinery and the oil site before the job is done. During this time both the Driller and refinery are vulnerable and should be guarded strongly.
