25. Tihar Pneumatic Rifle
Though Metro 2033 was a tragically underrated game, it certainly wasn't because it lacked a variety of weapons. Hands down, our favorite was the Tihar Pneumatic, one of the game's two pump-action, pressurized-air powered guns. You literally had to take a few seconds to pump it before you could bring it up to full power, but it was totally silent, and the ball bearings it fired were often lethal at close- to mid-range. It made Metro's unique stealth portions that much more tense and fun.