A group of stalkers, for the first time, reaches the very heart of the Zone-the Chernobyl Nuclear Power Plant-and triggers a cataclysm on the brink of a catastrophe. An immense blast of anomalous energy transforms the Zone: the once reliable and relatively safe roads are no longer so, the landscape is wiped clean by outbursts of anomalies, and previously unknown areas appear on the Zone map. Stalkers and expeditions perish or end up isolated within the lost territories.

boredgunner says

8/10 - Agree (3) Disagree

Although Clear Sky retains the excellent modding capabilities, the story is weak and the eating function has been removed. You'll find much more interesting mods for Shadow of Chernobyl and Call of Pripyat, as they're the better games.