You survived State of Decay. Now you have to make the next move and tell your story. Undertake a campaign that changes according to your choices. Repel the zombie threat with points and compete with other survivors in the world. Complete the challenges to unlock new heroes with unique weapons and abilities. The more difficult the challenge is, the more progresses are made. You make the choices.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.