Just Cause 3: Sky Fortress is the first DLC pack from the Air, Land & Sea Expansion pass. Become the master of the skies with Rico's all new and fully armed, Bavarium Wingsuit. Save Medici from the threat of the terrifying Sky Fortress and its army of deadly robotic drones. This content pack includes new missions, challenges, the "Bavarium Splitter" assault rifle and the "Eviction" personal defence drone, all of which can be carried over into the main game.

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.