Here are the keys for playing multiplayer on Call of Duty 4. Here's the catch:

• You can't play over legit servers. Only cracked or hacked servers. (You can play this over Garena and/or Xfire or any other cracked server.
• There may be prominence of Hackers and will likely ruin your gameplay. Most open servers don't have punkbuster enabled. 
• Download at your own risk (although it is safe, I cannot guarantee if the link will be up again as my last post on 4shared got lots of complaints)

Download Here

Get the Garena Plus installer Here...

1.Once you get to your desired room, you can then edit the settings parameter for Launching COD 4 in conjunction with Garena. Click on Settings > Browse and find the executable multiplayer for COD.

2. Locate the iw3mp file from your COD4 installation folder (usually in Program Files > Modern Warfare)

3. On the Garena room, hit start game and the game will launch and choose your profile. First time users of COD 4 Multiplayer needs to edit their Key Code. Punch it in on options > multiplayer options > enter keycode





































4. You will probably wonder where to get these keys. You can get it HERE. Next up is to join a server, usually during peak hours there are many user rooms for you to join in. Click on Join Game > click the Source tab and it will change to Local, you can then join the hosted game of your choice.

Note: Make sure you join user rooms with pings lower than 150 or you will get raped especially by veteran players. You cannot join internet servers unless you paid for the game and have a legit key code.