The only intended way to unlock all missions is to complete each mission sequentially. Upon finishing Mission 15 (“Return to the Base”), all missions become accessible from the main menu’s “Select Mission” option. This is the “clean” method but requires beating the game’s notoriously unfair final section—a helicopter battle with limited ammo and no checkpoints. For most players looking for a quick unlock, this is impractical.
Skipping levels defeats the purpose of IGI’s challenge, but for returning players who have beaten the game before or those experiencing save corruption, unlocking all missions is a quality-of-life tool. Use it to practice the notoriously difficult Mission 9 ("The Bridge") or the stealth-heavy Mission 12 without replaying the earlier Russian outpost levels.
For less tech-savvy players, a game trainer is the easiest route. A trainer is a small program that runs alongside IGI and hotkeys the unlock feature. project igi 1 all missions unlock
With these methods, you can finally experience the thrilling conclusion of David Jones’ mission to stop Ekk from launching nuclear missiles—without the rage-inducing walk through the snowy forests of Mission 7.
One way to unlock all missions in Project IGI 1 is by using cheat codes. These codes can be entered into the game's console or text file, allowing players to access all missions. The only intended way to unlock all missions
To use cheat codes, follow these steps:
Alternatively, players can also use the game's built-in console to enter cheat codes. To do this: For less tech-savvy players, a game trainer is
Once the cheat code is activated, players can access all missions in the game by selecting them from the mission selection menu.
