– 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?

If you feel guilty, consider this: the game’s lack of saves is widely considered a design flaw. By unlocking all missions, you are merely fixing a frustration, not truly cheating.

Find the folder named or "humanplayer" (depending on your specific game patch or version).

The most reliable way to have every mission available immediately is to use a "100% Save Game" file or a "Mission Unlocker". Find a Save File : You can download all-mission savegames from sites like PC Savegames Installation

Download an "All Mission Unlock" pack from community sites like Project IGI Databank on Fandom .

Start the first mission (Trainyard) or any mission you currently have access to. While in-game, type the code

This is the fastest method to unlock all levels without downloading any external files.