Just a tip, In the US it is never legal to play a used pc game. When you buy a pc game you aren't really buying the disk but are in effect buying the right to use it. It spells this out in the EULA. The only time its ok to buy a used pc game is if you have a legit cd key but damaged the disk somehow. Then you can buy a used copy for the disk but you must still own a legal cd key.adrake4183

Thanks for the replies fellas. I figured I was out of luck. No way to prove to STEAM that my game is originally mine, which it isn't. It is a STEAM game and not EAs or whoever. I found this out after a 30 minute install process and when I clicked on the game icon I was directed to STEAM for activation. I then looked on the box and found the VALVE logo. So, I guess that even if the cd key had been included it has been already activated and I would have got such a message from STEAM.

I already bought a bunch of games from STEAM and I guess I'm going to buy another. The seller on Amazon is definitely going to getting some negative feedback. He shouldn't be selling this kind of stuff. It was not my intent to buy warez. I was just looking for a bargain. Guess I'm going to have to be more careful in the future.