It blends traditional shooter elements with stealth and environmental puzzles. Players can switch between first-person and third-person perspectives , a unique feature for its time.

Known for being punishingly difficult, the game features aggressive AI, snipers that can kill in one shot, and complex level designs like the infamous "trench" and "train" missions.

The original 2002 release often requires patches to run on Windows 10 or 11. Community-maintained versions, like those found on GOG or Steam , typically incorporate these fixes. Key Version: v1.041 The v1.041 archive usually includes: