PISA - Project Inverno Step Attenuation addon - S.T.A.L.K.E.R. Anomaly mod for S.T.A.L.K.E.R.: Call of Pripyat
Now NPCs also walk in the snow, and make sounds based off distance!
Fabio Conte Stalker Anomaly Mod For Call Of Pripyat Isa Project Inverno Step Attenuation Ingleplayer Maps Ultiplayer Maps Layer Skins
Source: moddb.com