After payment has been approved, your game key will be included in your order confirmation email. You can access your key by following a link in the email. Next, you can activate your key on its corresponding platform.
How will I activate my key for Call of Duty (COD) Modern Warfare 3 on PC?
Activate with Steam:
- Download and install the Steam client on your PC. (https://store.steampowered.com/about/), then sign up and log in.
- Locate the Steam key in your cdkeys.com confirmation email, and copy it to your clipboard by pressing “Ctrl+C”.
- Open the Steam client and locate the “+ ADD A GAME...” button on the bottom left of the window. Click this and choose the “Activate a Product on Steam…” option.
- Paste the key from your clipboard in the “Product Code” section when asked, and follow the rest of the prompts to add the game to your library.
- Your game is now viewable in the “Library” tab, and is available to download/install when you’re ready!
You can find additional support for the Steam client here:https://help.steampowered.com/en/wizard/HelpWithSteam