You Don't! :D
No there was not ever a demo for the game
you cant on demo
no
There is only a MW2 demo on PSN and XBOX Live. Unfortunately, Infinity Ward have not released the demo on steam and with a month left 'till Black Ops comes out, I don't think they will.
Conner there is a demo. whore
There is no demo, anywhere in the world.
No, there will not be a demo.
Not yet but I'm pretty sure that there will be. The Call of Duty Black Ops Demo has been released!
No there is not
steam
no
No, it does not.