Cheat codes may not work on certain [EU] v1.0 versions or specific digital distributions without a third-party trainer.

To unlock all missions in Project IGI 1 (I'm Going In) , you can use a keyboard shortcut at the main menu or manually swap mission files. Method 1: Keyboard Shortcut (Easiest)

You will see a list of numbers and settings. Look for the section that lists mission completions. It will look something like this:

CompletedMissions – a binary value (not DWORD).