The impact can be both positive and negative. Each anomaly gives rise to a family of two or three artifacts of a similar type, which differ in appearance and strength of impact on the host's body. : Call of Pripyat are generated by thermal, chemical, electrical, radiation, organic and gravitational anomalies. The location of old artifacts in anomalies changes. Emissions in the Zone occur once or twice a day.

Artifacts are mysterious formations with unique properties that appear in places of anomalies after emissions. : Call of Pripyat' is unlocked after finding 23 artifacts. The achievement 'Seeker' (English Artifact Hunter) in 'S.T.A.L.K.E.R.