Haven't played the second installment Clear Sky yet. Shadows of Chernobyl was good. Installed it thrice only to uninstall it not even half way thru. The last time I did it, I decided to sit back and complete it. The game sure is lengthy if you go by the secondary objectives.
Hard to believe Stalker I had some kick ass arsenal back then. Hope Clear Sky has some worthy missions like the Ist game. Ending surprisingly was a shocker.