Developer GSC Game World excelled at crafting a heavy, tense atmosphere in its previous games, and it looks like S.T.A.L.K.E.R.: Call of Pripyat with follow suit.
Where S.T.A.L.K.E.R.: Clear Sky was a prequel, Call of Pripyat is a sequel to the original Shadow of Chernobyl, taking place after the events in the original game, in case you didn't know what sequel meant. It features "a complete set of new locations", so those of you worried that the set may be less than complete can rest easy. It also features those guys in the trailer, which could be considered either a good thing or a very bad thing.