Project IGI 3 does not officially exist, and any file claiming to be a 105MB compressed download of it is likely malware or a scam.
Files labeled as "highly compressed" (like a modern game shrunk to 105MB) frequently contain trojans, crypto-miners, or ransomware. Project IGI 3 Compressed PC Game Free Download 105MB
You can buy the original games safely and legally. They are fully optimized to run on modern Windows operating systems without the need for sketchy patches. Project IGI 3 does not officially exist, and
The original developer, Innerloop Studios, went out of business shortly after releasing the sequel, IGI 2: Covert Strike , in 2003. While a prequel titled IGI: Origins was announced by Toadman Interactive, it has not been released as a finished "Project IGI 3." IGI 2: Covert Strike