The game is still S.T.A.L.K.E.R. which gave it some points, and also it tells you a bit about "Shadow of Chernobyl", but overall I was very disappointed with this game.
The gameplay was boring, and the story wasn't interesting. As I said, it gained points, because it was still S.T.A.L.K.E.R. but it lost a lot because of bugs, and boring storyline.
I still need to play "Call of Pripyat", and hoping that it is much better.