Play the first mission without mod changes to appreciate the original, then enable DEV-iANCE features for the rest of the campaign. For preservationists, the mod also includes a “vanilla+” mode that fixes only crashes and resolution, leaving gameplay untouched.

Released in late 2000 by Innerloop Studios, Project I.G.I. stood out in a sea of corridor-based shooters like Quake or Half-Life . It offered something different:

: Powered by a flight simulator engine, the game featured vast outdoor environments that allowed for multiple approaches to an objective.

Tactical Stealth and The "DEViANCE" Era: A Look Back at Project I.G.I.

: On the main menu, press Left Ctrl + Left Shift + F9 simultaneously to instantly unlock all 14 missions.

Feature engineering & baselines

is the definitive way to experience Project I.G.I. in the 2020s and beyond. It respects the original’s hardcore tactical identity while removing technical and artificial difficulty barriers.