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Strange chemical processes go non-stop in this anomaly. They result in acid which eats away skin and toxic gas which devours lungs equally well… The good thing is, that the anomaly is easy to spot in the open air… It is less pleasant to unexpectedly discover it in a dark tunnel.

The Gas anomaly is a type of anomaly featured in S.T.A.L.K.E.R.: Clear Sky and S.T.A.L.K.E.R.: Call of Pripyat.

General characteristics[]

Not always easy to spot, this Anomaly is recognizable by the green gas clouds floating and wandering over the ground. If one approaches, the screen will turn green and a hissing noise can be heard. When triggered by metal parts or organic tissue, it emits acidic compounds, splashing them around in its vicinity.

It should not to be confused with the Fruit Punch, due to the fact that it behaves more like a cloud or fog bank rather than a puddle of liquid as the Fruit Punch does.

It seems to be an evolved or greater version of Fruit Punch, because Fruit Punch does not have the toxic choking effect Gas does, and is more corrosive and more damaging.


Forms six types of artifacts:


Clear Sky[]

Call of Pripyat[]


  • Sometimes, most of the flora growing within the Gas anomalies form strange mutated vines.