its probably because you put your self as an under 18 year old on the settings when you first made an on line account you cant change unless you make another account.
No
Yes
Yes, there is online multiplayer on Call of Duty 4: Modern Warfare.
there is none
no but your just going to have to look on modern warfare 2 online
Jtags
You cant!!!!!!!!!!!
Call of Duty World at War, Modern Warfare, Modern Warfare 2, Black Ops, and Modern Warfare 3 all have online multiplayer.
Yes, it is the beta for modern warfare 3 online, only available on PSN and MAC
No. None of the Modern Warfare series have been 2 player online (aka. online split screen).
You can in splitscreen mode, but not online.
Millions.