You have been selected for active service in the Commandos Corps, and must now mobilize in a series of 8 new dangerous missions. You may come with experience of action 'Behind Enemy Lines' or perhaps you are just a rookie - whatever you are, you will be given the opportunity to push your daring and tactical ability to the limit.
Open the Steam client, login and locate the Games tab on the top menu. Click this and then select “Activate a Product on Steam…”
Enter your unique code that's displayed on the 'Orders' page of CDKeys.com and follow the prompts to activate.
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
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