The International Research Group (ISG) is a cut-out group sponsored by the United Nations. IIG previously appeared in S.T.A.L.K.E.R .: Clear Sky at the Generators location. Although it was cut out, its mention is still preserved in the CHN. A mercenary named Hog can tell that a large expedition to the Zone has arrived, and they say they are definitely not scientists: you can see a real fighter from a kilometer away. Apparently, this group was very similar to the mercenaries, and their main goal was some kind of secret order from the UN to search for something in the center of the Zone. All members of the IIG had armor in the form of modified Monolith coveralls (normal and scientific with slightly changed colors and new patches). Weapons were used only by NATO, most often TRs-301. The skins are made with high quality, I did not notice any bugs. Enjoy your game!