Provide a list of available on modern platforms.
If you are looking to play the classic games that defined the series, they are often available via archives or legacy software sites: igi-3-game-free-download
There is no official game titled that has been released as a standalone sequel by the original developers. While fans often search for "IGI 3," they are typically referring to one of the following: 1. IGI: Origins (Official Upcoming Prequel) Provide a list of available on modern platforms