Go to the directory where I.G.I. is installed (usually C:\Program Files (x86)\Innerloop\Project IGI ).
Open Project I.G.I. and wait for the main menu to appear.
There is usually no visual confirmation or sound effect. However, once you click on "Single Player" or "New Game," you should see the full list of missions available for selection. igi 1 how to unlock all missions
This is the easiest way to unlock every level without downloading third-party software or messing with game files.
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) Go to the directory where I
If the cheat code fails due to your specific game version (such as certain GOG or Steam wrappers), you can manually "tell" the game that all missions are completed by editing a configuration file.
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 and wait for the main menu to appear
While sitting on the main menu screen, simply type the following on your keyboard: nada
Look for a configuration file related to mission progress.
Released in 2000, remains a tactical shooter classic known for its unforgiving difficulty and lack of an in-game save system. If you're stuck on a particularly brutal mission like "Eagle's Nest" or simply want to revisit your favorite levels without playing through the entire campaign, unlocking all missions is a popular shortcut.