You can also reclaim these games DRM free at https://www.gog.com/reclaim.

Please do play this game if you win, Its my only request.
also check out if you are new to the series and want to play it more https://steamcommunity.com/sharedfiles/filedetails/?id=121125400

Check out my other giveaway for the rest of the S.T.A.L.K.E.R. games.

https://www.youtube.com/watch?v=wR-f6aRUSw0

View attached image.