The skies over Europe are a dangerous place, where ace pilots lead their squadrons to glorious victory or crushing defeat! Take control of dozens of the most famous fighter planes of WWI and head into the dogfight. Roll, slip, and loop to get the drop on enemy aces. Upgrade your fighters over the course of your campaign and promote your best pilots so they learn new skills to give them an edge in battle. Can you change the tide of the war? Or will you go down in flames to an enemy ace?Go to: http://store.steampowered.com/ and download STEAM client
Click “Install Steam” (from the upper right corner)
Install and start application, login with your Account name and Password (create one if you don’t have).
Please follow these instructions to activate a new retail purchase on Steam:
Launch Steam and log into your Steam account.
Click the Games Menu.
Choose Activate a Product on Steam…
Follow the onscreen instructions to complete the process.
After successful code verification go to the “MY GAMES” tab and start downloading.