Project Igi 1 All Missions Unlock Top -
If you want to unlock the game legitimately but are stuck on a specific hard level, there is a hidden developer shortcut:
The developers at Innerloop Studios included a built-in debug cheat to unlock the Project IGI 1 all missions unlock top instantly. This works on the retail CD version, the digital re-release on GOG.com, and the original PC disc. project igi 1 all missions unlock top
If you want to unlock the missions by playing but want the "top" fastest route without cheats, follow this condensed speedrun path: If you want to unlock the game legitimately
By beating Mission 14 legitimately, the game permanently unlocks all missions on your profile. By beating Mission 14 legitimately, the game permanently
If you prefer not to download external files, you can use the in-game cheat console to unlock levels one by one. This is a built-in developer feature that allows you to jump to specific missions.
Steps to follow:
Keep in mind that this cheat can sometimes be buggy depending on which version of the game (original vs. Steam/GOG) you are running.