Henriquejr spotted a report about the Stalker: Anomaly version 1.5 on PC Gamer:
More information.Stalker: Anomaly 1.5 is a worthy fan-made successor to the series
Get in here, Stalker.
It would be selling Stalker: Anomaly short to call it a mod. Based on Stalker: Call Of Pripyat, GSC Game World's haunted Ukranian survival sandbox, Anomaly feels more like a sequel than a user-made collaboration. Built on the now open-source and community-maintained X-Ray Engine, it features the combined and overhauled environments of all three official games in the series (plus some new ones) making for a sprawling, unpredictable sandbox full of mutants, mercenaries and murder.
[...]