The official serial code for activating the game "Call of Duty: Modern Warfare 2" on your Steam account. This activation code allows you to legally activate, download and play the "Call of Duty: Modern Warfare 3" game.
Call of Duty: Modern Warfare 3 is the 2011 release in the best-selling Call of Duty First-Person Shooter action series. The game is a direct sequel to the previous game in the series, Call of Duty: Modern Warfare 2, with a campaign storyline continuing the struggle of U.S. forces against an invasion by the Russian Federation following the framing of an undercover U.S. agent in a terrorist attack on Moscow. Along with classic Call of Duty multi-character control, Call of Duty: Modern Warfare 3 contains deep multiplayer support, including two-player Co-op Survival mode. The game also contains all-new Kill Streak categories and customizable strike packages that offer more options for player combat styles and strategies.
If you have already installed Steam Client and you have a Steam account then skip the first step.
1. Download and install Steam Client.
2. Open the Steam Client software
3. If you do not have a Steam account then click "Create a new account“
4. If you already have a Steam account then log in.
5. Click on „+ Add a game“ icon in the left corner in the bottom of the page
6. Choose "Activate a product on Steam".
7. Follow the instructions on screen and enter the code we have sent to you
8. In a few minutes Steam will authenticate the code
9. In order to see the game click "Library".
10. Click on the game in order to download it
Try automatic system requirements detection tool from the link below
*** Steps 1-3 are for first time users***
1) Press the button "Can you run it"
2) Your internet browser downloads a program called "Detection"
3) Run "Detection"
4) Check the results if your computer can run your desired game or not.