An official was never released by the original developers. While a prequel titled I.G.I. Origins is in development, any existing "Project IGI 3" download is likely a fan-made mod or malware masquerading as the game. Status of the I.G.I. Series
The original tactical shooter developed by Innerloop Studios. I.G.I.-2: Covert Strike (2003): The official sequel. project-igi-3-pc-game-free-download-utorrent-ocean-of-games
If you are looking for gameplay similar to the Project IGI series, consider these titles: Tom Clancy's Ghost Recon: Wildlands Breach & Clear An official was never released by the original developers