Purchase the legal digital copy from GOG.com (Good Old Games). GOG optimizes classic games to run smoothly on modern hardware right out of the box.
If you want to apply the remaster patches, you first need the base game: I.G.I. Origins on Steam project igi remastered pc download
Despite clunky AI and a lack of multiplayer, Project IGI remains a cult classic. It’s no wonder that searches for spike every few months. Purchase the legal digital copy from GOG