First you verify that your online connection to play games still works and that you can play other games.
As of 26/01/2011 Call of Duty 4: Modern Warfare online multiplayer mode is working for PlayStation Network, Xbox Live and Windows (PC).
help hotline on your booklet and ask for customer service or call Sony and talk to them
Yes, there is online multiplayer on Call of Duty 4: Modern Warfare.
Call of Duty World at War, Modern Warfare, Modern Warfare 2, Black Ops, and Modern Warfare 3 all have online multiplayer.
yes
Modern Warfare 2 is a better game if you are going to play online.
No
yes
No there is no cheats but there is glitches
You get better by practicing and working hard.
well call of duty and modern warfare are the same it is called Call of Duty: Modern warfare and then came call of duty: modern warfare 2
Call of Duty 4: Modern Warfare came out first. This is the first game in the Modern Warfare series, and Modern Warfare 3 is the third game in the Modern Warfare series.
Multiplayer is free.
Sadly, you cannot get gamer score points in CoD: 4 Modern Warfare Multiplayer.