I recently purchased a second hand copy of Call of Duty Black Ops. I have tried to install it via steam but when it asks me to input the game key it tells me that the game key has already been used under a different account to mine. Is there any way round this??

  • @XtremeBaumer Please don't answer in comments. Jul 19, 2019 at 13:41

1 Answer 1


Welcome to the Arqade SE!

Unfortunately, when it comes to disc based PC games requiring a Product Key / CD Key, there is no legal way around this. A product key may only be used once as it is used to essentially "register" the game as yours, or in this case, the other persons.

Sorry about that! :(

  • 1
    Thanks for your answer. I figured that might be the case!
    – Andy W
    Jul 21, 2019 at 0:05

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