The most direct method to advance through the campaign without actually completing objectives is using a built-in keyboard shortcut. While playing any mission, press the button to pause. Navigate to the Print Screen (SysRq)
The game will immediately register the mission as completed, allowing you to move to the next level in the campaign. Mission Skip Console Commands
Unlocking all missions in Project I.G.I.: I'm Going In (IGI 1) is a common goal for players who wish to skip the game's steep difficulty curve or revisit specific high-octane levels like "Eagle's Nest" or "Nuclear Infiltration." Unlike its successor, IGI 2: Covert Strike
The core campaign consists of 14 numbered missions (from "Mission 1: Trainyard" to "Mission 14: Missile Trainyard"). The game saves your progress via passwords shown at the end of each successful mission. To unlock the next mission in sequence, you must meet two conditions: