However, given that the game is over two decades old and no longer officially supported (the sequel, IGI 2: Covert Strike , also has no built-in level skip), unlocking all missions is widely accepted in the retro gaming community as a quality-of-life improvement.
Paste the downloaded folder here, replacing the existing one. Full Mission List Once unlocked, you will have access to all 14 stages: Military Airbase Radar Base Get Priboi Border Crossing Missile Trainyard Defend Priboi Eagle's Nest I Eagle's Nest II Nuclear Infiltration Finding The Bomb Unlock All Missions In Igi 1