Follow these instructions to activate a new retail purchase on Steam:
  • Launch the Steam client software and log into your Steam account.
  • Open the Games menu.
  • Choose Activate a Product on Steam.
  • Follow the onscreen instructions to complete the process.
  • The game will be downloaded and added to your Steam LIBRARY.


Additional information about Steam:


  • Activation will be blocked for 1 hour if you type an incorrect serial number three times in a row.
  • If you experience any problems while accessing your account, try contacting Steam Technical Support directly.


See also: Instructions for redeeming a Boxoffstore code