In the gaming community, we often talk about "earning" the ending. But I.G.I 1 is a unique beast. It is legendary for its difficulty spikes. Being an "Usttad" (Master) of the game doesn't mean you have to suffer through the same sniper death 50 times on the same level.

Unlocking all missions allows you to:

By: A Veteran IGI Operator

If you grew up in the early 2000s, Project I.G.I.: I’m Going In was the ultimate test of patience, stealth, and sheer grit. There were no saves during a mission—just you, your wits, and an enemy base full of guards with superhuman hearing.

But let’s face it: getting stuck on Mission 3 (the infamous SAM base) or losing your progress due to a missing save file is frustrating. You want to jump straight to Mission 14: The Showdown or practice your sniper skills on Mission 11: Double Cross.

Here is the complete, step-by-step guide to unlock every mission in IGI 1. No cheating software required—just a simple file edit.

Once unlocked, here is the campaign you can now master:

| Mission | Name | Difficulty | | :--- | :--- | :--- | | 1 | Training | Very Easy | | 2 | Contact with the Enemy | Easy | | 3 | The SAM Base | Medium (Tough) | | 4 | The Radar Base | Medium | | 5 | The Airfield | Hard | | 6 | The Bridge | Hard | | 7 | The Missile Train | Very Hard | | 8 | The Nuclear Plant | Very Hard | | 9 | The Fuel Depot | Hard | | 10 | The Missile Silo | Insane | | 11 | Double Cross | Hard | | 12 | The Forgotten Base | Insane | | 13 | Priboi’s Stronghold | Very Hard | | 14 | The Showdown | Epic |

Unlike modern games that require complex "trainer" downloads or mod installations, I.G.I 1 has a beautifully simple unlock mechanic built right into its files. You don't need to be a computer genius; you just need to know where to look.

Disclaimer: Always make a backup copy of your file before editing it, just in case something goes wrong.

Here’s a strange bug discovered in v1.0 (unpatched):
If you rename the mission file 14.ig (last mission) to 01.ig and launch New Game, the game loads the final mission as first. But saving breaks, and you can’t go back. Not a true “unlock all,” but a sequence break worth noting for nostalgia.