I understand you're looking for Project IGI 2: Covert Strike on Android. However, I need to give you a clear and honest response before providing any "deep" analysis.

If you want to play the authentic game with all 19 missions and tactical stealth mechanics, it is best played on PC through verified digital storefronts: : Offers a version optimized for modern Windows systems. ZOOM Platform

If you see a website claiming you can download IGI 2 as a simple 50MB or 100MB APK file,

: For a more traditional military campaign experience.

: The original developer, Innerloop, closed years ago, leaving the intellectual property rights in a complex legal state.