Both Black Ops games have Combat Training, where you can fight bots offline on a simulation of multiplayer. You can only play deathmatch modes though, as the bots do not have the AI required to play with objectives.
no, because there would not be much space in front of the sensor bar and also if someone walked in front you wont be able to move the cross-hairs
red steel
Online and offline.
Yes.
no , but call of duty modern warfare reflex (cod4) has
Yes
yes
I believe Call of Duty 1, 2 and 3
if you mean offline then no sorry well if it was i would be playing it but i am sorry :(
number one
yes it is for single player offline and multiplayer online if by classic you mean Call of Duty 3 see related link
You can't. But I think you can with Modern Warfare 2's new multiplayer system.
Yes, Call of Duty: Black Ops will have online multiplayer just like many other Call of Duty video games.
No, the leaderboard is for multiplayer online only, anyhting you do offline or in single player doesn't go on the leaderboards.