It sounds like you're looking for a feature related to the game IGI 2: Covert Strike , specifically the version downloaded from (a popular site for repacked PC games).
The game features a range of realistic and engaging gameplay mechanics, including:
The story-driven single-player mode spans 19 missions across real-world locations in Russia, Libya, and China.
Enemies are designed with complex sensory systems—they can hear your footsteps and spot you in the shadows, requiring careful observation of their patrol patterns. Minimum System Requirements
The game takes place in several locations around the world, including enemy-occupied territories, embassies, and other secure facilities. Players must use their wits and skill to evade detection, sneak past guards, and complete objectives without being detected.