It is required: game "S.T.A.L.K.E.R.: Clear sky" version 1.5.04
Size: 310 KB
Apparently from the name, this of modes replaces a knife. More precisely, there were only new textures, the chiterskikh of plugins it seems "a knife beats at distance of 100 meters" isn't present here, and it to the best.
Place the gamedata folder from archive in the directory with game.