To unlock all missions in IGI: Origins, you'll need to use the following cheat code:
While there isn't a cheat to unlock levels directly via text, there is a famous file edit that allows you to modify your loadout, essentially giving you a massive advantage that makes unlocking missions naturally much easier. This is often what people mean when they look for I.G.I. cheats. Igi All Mission Unlock Cheat
If you have unlocked the levels but need help beating them, these codes work for by typing them during gameplay: allgod : God Mode (Unlimited health). allammo : Unlimited ammunition. easy : Sets difficulty to easy. ewww : Instantly kills enemies. To unlock all missions in IGI: Origins, you'll
For many versions of the game, you can unlock all levels directly from the main menu: Open the game and stay on the on your keyboard (you won't see a text box, just type it). Immediately after, type (all missions). If you have unlocked the levels but need