The stand-alone mod S.T.A.L.K.E.R. Anomaly aims to be the most stable and customizable experience for fans of the S.T.A.L.K.E.R. games. It’s powered by the Monolith 64-bit engine, a custom fork of the X-Ray engine.
https://www.moddb.com/mods/stalker-anomaly/addons/soundscape-overhaul-2

