Beat the game! Both the areas of Pripyat, and Chernobyl were all out war zones. They got pretty crazy, I pretty much just ran through Chernobyl dodging bullets, since there's so many people and helicopters firing on you.
What was behind the Monolith and the ZONE was pretty interesting, but I'm not gonna spoil it. I got the second, sixth, and the true ending, the seventh.
Cant wait to see what happens in the third Stalker game, which I just ordered, since it takes place right after the first one. The second game, Clear Sky is a prequel to the first.