Project IGI is a tactical shooter based on the Joint Strike Fighter 3d-engine. In the game, you are a special agent who has to complete missions all on his own, infiltrating bases with a fair number of enemies. Your overall goal is to locate a stolen nuclear device so that it can be recovered.

An assortment of weapons is in the game, including a sniper rifle, an AK-47, grenades and a rocket launcher to name a few.

In completing the missions you mostly have one goal: you should not be seen by the cameras or detected by a large group of the enemies at once so that you can complete the level. As soon as an intruder is detected, the enemies are alerted to your presence and the level gets quite difficult to finish. Since you can't save during the mission, you will have to start from the beginning if you don't complete it(i.e., getting killed).