S.T.A.L.K.E.R.: Clear Sky is a post-apocalyptic game set in the area surrounding Chernobyl after a second, larger nuclear disaster strikes the area. The player character and the world around them are formed into a terrifying scene where mutants roam the landscape and space-time anomalies throw up grotesque, eldritch horrors in a world where survival is paramount. As the first in the trilogy, S.T.A.L.K.E.R.: Clear Sky sets up the series with its signature brand of non-linear storytelling and gruelling survival horror elements. The shooting is difficult, the landscapes are harsh and the monsters are terrifying. Whether you're contending with mutated beasts or just other humans willing to do anything to survive, you're in for a tough time.