UPDATE 09/05/15:

Hi all,

Just wanted to give you an update on where we are with the key redemption, we now believe we’ve got most of the keys up and running and you should be able to redeem them via your Steam Client.

• Load up your Steam Client
  
• Click “Add a game” found in the bottom left of the window
  
• Click “Activate a product on Steam”
  
• Click “Next”
  
• Follow the instructions and when asked enter your GFWL CD Key into the “Product Code” box – Make sure to include any hyphens and capital letters
  
• Hit “Next”
  
• Your code will then be verified and the DiRT 3 Complete Edition will be added to your library

If however you’re having issues redeeming your key still we’re asking that you send us the following information:

For boxed copies:

• Please send an email to custservice@codemasters.com with the subject line “DiRT 3 Boxed Copy Code”
  
• Please include in the email a photograph of the back of the manual clearly showing the code and if possible a copy of your receipt.
  
• Please type out the key in your email and include as much information as possible regarding where and when it was purchased

For digital copies

• Please forward the confirmation email you would have received from the online retailer at the time of sale with the key on to custservice@codemasters.com with the subject line “DiRT 3 Digital Copy Code”

Once we’ve received your email we’ll then validate the key you have sent to us and contact you back within 48 hours.

The more information you can provide us with the quicker we will be able to resolve your query. The closing date for these claims is Friday 24th April 2015 so please contact us before then.