If the game is genuinely delisted, sites like MyAbandonware are generally considered safer than Ocean of Games because they don't use deceptive installers—they offer the original ISO files. You would still need a fan-made "patch" (like dgVoodoo2) to fix the graphics, but it is malware-free. Verdict: Is "Igi 1 Ocean Of Games" Worth It? No.
The best way to honor the legacy of Project I.G.I. isn't by clicking sketchy links. It is by buying the $5 version on Steam, turning off the lights, turning up the volume to hear those distant footsteps in the snow, and remembering that in 2000, no crosshairs made you feel like a real spy.
GOG specializes in taking old games and coding them to run perfectly on Windows 11. If I.G.I. is available there (it rotates), that is the definitive version.