Steam Support
An error occurred trying to handle that request. Please give us a few minutes and try again.
Steam Support
Duplicate key error
A duplicate product code error means that the CD key you are trying to register has already been redeemed to a Steam account. The key cannot be registered again.

If you received a duplicate CD key from your retail purchase you will need to contact the retailer who sold you the key. Steam Support cannot issue a replacement CD key.

For more information on retail CD keys, please read this FAQ.