Down below, the enemy sits unaware while a sleek, metallic creature slices through the dark. No blips show on the radar, no sign is given. Then, an instant, the roar of exploding ordnance shatters the night, demolishing targets, sending troops and pilots scrambling.
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