Change the status or "unlocked" value from 0 to 1 for all missions. Method 3: Using a 100% Save File
Note: If "nada" doesn't work, try typing it during the intro cinematic or while in the mission select menu itself. Method 2: The Config File Hack project igi 1 all missions unlock top
Look for a file named (or similar configuration files depending on your patch version). Open it with Notepad. Look for lines labeled Mission 1 , Mission 2 , etc. Change the status or "unlocked" value from 0