DoF CD Key Help - All the information you need.

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I have experienced several desappointments since starded to buy games. But this one is new. I can't even launch the game thanks to an invalid key.
Luckily, for these who sell such poor products, My mastercard number was valid when i bought this...stuff. Do you guys ever test your games ????
Whould it be too much to ask you to deliver a key that works?
Anyway, it seems that i am not alone.
Au revoir