Since the game does not feature a standard "Level Select" menu by default, you have to use a specific cheat code or a quick file edit to gain access to all 14 missions. Method 1: The Main Menu Cheat Code (Fastest)
If the code doesn't work the first time, try typing it slowly or ensure your "Caps Lock" is off. Method 2: The "Unlocker" File Edit
Go to the directory where I.G.I. is installed (usually C:\Program Files (x86)\Innerloop\Project IGI ). igi 1 how to unlock all missions
While sitting on the main menu screen, simply type the following on your keyboard: nada
– Infiltrating the mountaintop fortress via cable car. Eagle's Nest II – Deep infiltration into the bunker. Nuclear Detonation – Locating the bomb. The Finding of Ekk – The final showdown with Ekk. Why Unlock All Missions? Since the game does not feature a standard
Note: Some versions of the game store progress in a CONFIG.CFG or a user profile folder.
This is the easiest way to unlock every level without downloading third-party software or messing with game files. Nuclear Detonation – Locating the bomb
Inside the main directory, open the folder named PC .