OK so I bought the Witcher 1 on steam two days ago because it was on sale and I want to play through both games before Witcher 3 comes out. After I finished downloading them I began playing Witcher 1 and a window came up saying that I have a product key that I have to enter in the game at one point. I copied down the key and began playing. I'm already up to chapter 1 already and there is still no place to be found where I put this key in. Can someone tell me what this product key is for? Where do I use it? Do I use it in the game at all, do I use it on another website, somewhere on steam? If this product key is not used at all, will I still be able to transfer my Witcher 1 saves onto Witcher 2?
Ususally the game prompts you when it wants a key. Most cases steam already has the key inprinted some games don't ask for it. And if they do it's on the website of the game it self. But don't worry you will be able to use your saves.