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.
You can't, modern warfare 2 has only one player online but it has splitscreen which is only local play.
Call of Duty World at War, Modern Warfare, Modern Warfare 2, Black Ops, and Modern Warfare 3 all have online multiplayer.
You could search online for CoD Modern Warfare 2 for PC Otherwise Play or Game should have it
no because once you go online you will start back from level 1. no emblem, no callsign, no unlocked guns.
i dont no!
No. None of the Modern Warfare series have been 2 player online (aka. online split screen).