If you have xbox then you need an xbox live account or if you have PS3 you need a PSN account.
Then go on multiplayer and select play online.
No
no but your just going to have to look on modern warfare 2 online
Jtags
You cant!!!!!!!!!!!
You can in splitscreen mode, but not online.
In Spec Ops, yea.
Call of Duty World at War, Modern Warfare, Modern Warfare 2, Black Ops, and Modern Warfare 3 all have online multiplayer.
You can't, modern warfare 2 has only one player online but it has splitscreen which is only local play.
You could search online for CoD Modern Warfare 2 for PC Otherwise Play or Game should have it
i dont no!
no because once you go online you will start back from level 1. no emblem, no callsign, no unlocked guns.
No. None of the Modern Warfare series have been 2 player online (aka. online split screen).