No. It has never shut down, and probably never will shut down.
Depends, which Call of Duty are you talking about.
No, you can't play multiplayer in Call of Duty 3 Wii.
In Call of Duty: Black Ops, to go on multiplayer you have to go to multiplayer on the menu that says: CAMPAIGN MULTIPLAYER ZOMBIES OPTIONS
no
You can play online multiplayer in Call of Duty 3 for Wii, but you can't play multiplayer in the sense of two controllers on one Wii.
Yes, there is online multiplayer on Call of Duty 4: Modern Warfare.
no you can only do it in call of duty 5
The Call of Duty World at War Final Fronts for the PS2 does not have multiplayer available. If you want multiplayer for World at War you need get a PS3
Online and offline.
Yes.
I believe Call of Duty 1, 2 and 3
U go to multiplayer if no multiplayer u beat