Serial Key lost - PC formatted

[Your Computer]

If you bought the game here at the FG store, you can go to http://shelf.frictionalgames.com and enter your email and order number. That way you can recover your serial by yourself. (If you still have the order number at least..)

Order number and serial key are within the same e-mail. So, chances are they don't have either. However, in that same link, there is another link labeled "Esellerate After Purchase Services" which they can click on, and on the next page they can enter the e-mail they used when they purchased the game to receive their order history. This should provide them with both their order number and serial key.