These are not legally available for free download. You can purchase them legitimately on platforms like GOG.com or Steam when available.
Downloading from unofficial sources often leads to: igi 3 game free download
Cons:
For fans of the franchise, IGI 3 attempts to build upon the foundation of Covert Strike with several key features: These are not legally available for free download
Because there is no official third game, any site offering a "full version download" for "IGI 3" is providing one of the following: What happened to IGI 3 video game? : r/AskReddit igi 3 game free download