The Steam version wraps the game in DOSBox. You need to:
Warning: Always back up the original file before editing.
Over the years, misinformation has spread about unlocking missions in I.G.I.-1. Let me clear it up:
| Myth | Truth |
|------|-------|
| "You need to beat the game on Hard difficulty to unlock Mission 14." | False. Difficulty only affects enemy health and damage. Unlocks are linear regardless of difficulty. |
| "There’s a secret code to unlock all missions at once: igiknowsall." | False. The only official cheat is mnaim. Others like igibeer only give ammo. |
| "If you use the cheat, you can’t complete the final mission." | False. You can absolutely play and finish Mission 14 after using mnaim. |
| "Unlocking missions resets your weapons." | True. If you skip to Mission 14 via cheat, you start with default gear (pistol + knife). Use the save file method to keep advanced weapons. |
Introduction IGI: I'm Going In (IGI 1) is a classic tactical first-person shooter known for its stealth-focused missions. The original game uses a fixed mission progression, but players have long sought ways to unlock or access all missions for replay, practice, or custom playthroughs. Below are the reliable methods to access every mission in IGI 1 on PC.
Method 1 — Use the Mission Select in Save Files
Method 2 — Use the Built-in Mission Select (if present) igi 1 how to unlock all missions
Method 3 — Edit or Replace Save Game Files
Method 4 — Use Console Commands / Trainers (Advanced / Risky)
Method 5 — Apply Community Mods or Patches
Quick Step-by-Step Recommendation (Safe)
Troubleshooting
Legal and Safety Notes
Conclusion The most reliable, safe method is to create and back up mission-start saves during a normal playthrough. If you prefer quicker access, community mods or saved-game packs can provide mission-select functionality, but use them cautiously and keep backups.
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I.G.I.-1 is a 2000-era game. There is no anti-cheat, no online ban, and no penalty for unlocking all missions. The developers themselves included mnaim as a debug tool that they left in the final build intentionally.
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.
If you are not comfortable editing game files, or if the method above does not work for your specific version of the game, you can use a "Trainer."
Project IGI: I'm Going In is renowned for its challenging gameplay and lack of in-game saves. If you want to skip the struggle and jump straight to specific levels—or if you’ve reinstalled the game and lost your progress—you likely want to unlock all missions immediately. The Steam version wraps the game in DOSBox
Unlike modern games, Project IGI does not have a built-in "Unlock All" cheat code that you can simply type into a menu. Instead, you have two methods to access all missions: a manual file tweak and a trainer tool.
Here is how to do it.
Enjoy reliving the classic tactical shooter!
In IGI 1: I'm Going In, missions are normally unlocked sequentially by completing previous levels. There’s no official built-in cheat code to unlock all missions instantly from the main menu, but you can unlock them by:
Note: There is no console or mission-select cheat code like UNLOCKALL in IGI 1 — unlike in IGI 2. For the original IGI, save file replacement is the simplest reliable method.
To unlock all missions in I.G.I.-1: I'm Going In (also known as Project I.G.I.), you cannot do it through normal gameplay alone. The game uses a linear mission unlock system—you must complete Mission 1 to unlock Mission 2, and so on. Warning: Always back up the original file before editing
However, if you want to instantly unlock all missions (e.g., for replaying any level), here’s the solid, working feature: