This is a bad idea on several levels. Revenge of the Titans is from Puppy Games and is therefore prohibited by the exploited keys list. You also shouldn't be giving away a key if you have reason to believe it might not be valid.
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Hi
I create a giveaway of RoT but i dont know that my key isn't redeemed before. So i cant guarantee that key will work. Here's that risky giveaway:
http://www.steamgifts.com/giveaway/Bo5KT/revenge-of-the-titans
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