Project Igi Archive.org

If you are looking for the modern successor, be aware that while IGI 3 ( I.G.I.: Origins ) faced development challenges, the original remains a benchmark of the tactical genre.

Scanned PDF versions of the original game manual, providing essential context on controls, weapon specs, and lore. Patches & Updates: project igi archive.org

The game encouraged, and often forced, stealth. Rushing in resulted in quick death. If you are looking for the modern successor,