Destroy the Luftwaffe! There’s something new in the air, and it’s more than the hum of hundreds of aero engines... As the Luftwaffe launches its aerial offensive, the outnumbered Royal Air Force is scrambling to bring into combat new planes that will ensure victory over a stronger foe. Will they succeed?
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