This Keys allows you to play Multiplayer in call of duty for free.
Call of Duty 4: Modern Warfare is a 2007 first-person shooter video game, developed by Infinity Ward and published by Activision.The story takes place in the year 2011, where a radical leader has executed the president of an unnamed country in the Middle East, and an ultranationalist movement starts a civil war in Russia.
Supported OS: Microsoft Windows XP / Vista / 7 / 8
Processor: Intel Pentium 4 2.4 Ghz / AMD 64 (TM) 2800+ / Intel and AMD 1.8 Ghz Dual Core Processor or better supported
Memory: 512MB RAM (Windows XP), 768MB RAM (Vista)
Graphics: NVIDIA Geforce 6600 or better or ATI Radeon 9800Pro or better
Sound: DirectX 9.0c compatible sound card
Hard Drive: 6GB of free hard drive space
Internet: Broadband connection and service required for multiplayer connectivity
Free to Download
Just Click on any one of the Download Link above and get this cool game multiplayer keys.
All working, excellent game.