GameSpot may get a commission from retail offers. Several recent stealth-based games have put you in the role of a top-secret, high-tech operative armed with night-vision goggles and a sniper rifle.
The Dark Mod started life as a Thief mod for Doom 3, but these days it's available as a standalone game. It's basically Thief, though not set in the same universe. Still, it sure looks a lot like ...