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.
No, there will not be a demo.
There is no demo, anywhere in the world.
Conner there is a demo. whore
Not yet but I'm pretty sure that there will be. The Call of Duty Black Ops Demo has been released!
steam
No there is not
no
No, it does not.