If you saw the movie it give a lot of atmosphre,if you not its still awesome.
Graphics:This is not like Hl 2 or Oblivion,but you can see that they worked 6 years with this game.The graph is not so nice,but its quite good,you know,you travel in big places with many characters,animals,mutants etc...
Gameplay:Its quite good!Its like a survival game with no puzzles to solve.You shoot,you hide,you eat,you drink,you talk,you feel the magic of Chernobyl.
You can trade food with other stalkers.I dont know,maybe you can buy weapon and sell weapon.
Sound:The mutants voice gives a real creep,the weapon sounds are all right,its nothing special.I only heard music in the main menu.Ohh,wait,there a many music when you play but you cant notice it very well.
Value:In Hungary,its 10,000 HUF,its not to much,you can play hours a day.And i feel it will be a long game,with good multiplayer features.I havent played multiplayer yet.
Its a great game after all,it could be first person shooter of the year.And dont miss the movie,here is a little info: http://www.imdb.com/title/tt0079944/