The modding community has created single-player campaigns using engines like CryEngine and Unity . Search for "IGI 4 Reloaded Mod" or "Project IGI 4: Final Stand."
There is currently no official game titled " for PC. The Project I.G.I. series officially consists of only two released games, with a third entry currently in a state of development limbo. The Times of India Official Game Series Status download igi 4 for pc