www.callofduty.com
You can't play Call of Duty on a website. You have to buy it.
No site without buying the game Call of Duty Black Ops or Call of Duty World at War
You have to be 18 and older to go on the website
17
One can find a Call of Duty 2 demo download by going to the CNET website. The website offers Call of Duty 2 demo downloads for gamers to get a sense of the game before it is released.
from black ops website
Blackopscheats.co.uk
tarne`golet
you might like the call of duty wikia (see related link)
Play headquarters with a full party of 6 people and go for the objectives :)
http://www.supercheats.com/guides/call-of-duty-4/Intel-locations.shtml This website will explain where all the enemy Intel units are in the Call of Duty 4 campaign.
One can watch videos of Call of Duty: Black Ops 2 at a number of sites. Some of the best options include YouTube and the official Call of Duty website.