There is no official "Project IGI 3" developed by Innerloop Studios (the creators of IGI 1 and 2). The original studio disbanded in 2003. While there have been fan-made mods and attempts to recreate a third game, there is no official trilogy capstone like there is for other franchises.
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The original developer, Innerloop Studios, closed its doors years ago. The publisher, Eidos Interactive (now part of Square Enix / Embracer Group), never greenlit a proper sequel after I.G.I.-2: Covert Strike (2003). There is no official "Project IGI 3" developed
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