Not only is Half Life one of the best games of all time, but with the Gravity Gun it also provides gaming’s best gun ever: the gravity gun. The Gravity Gun isn’t exactly you’re run-of-the-mill weapon; it doesn’t even have any ammunition. The Gravity Gun has two modes. Firstly, it can be used to fire energy at your enemies that pushes them back. Secondly, you can use it to pick up objects and throw them. Say, is that an explosive barrel I see in the corner over there? KABOOM! The Gravity Gun makes virtually any part of your environment a potential weapon, meaning you can attack enemies in tons of different ways. Genius. Check out the video below for proof of the fact that Half Life 2’s Gravity Gun is the best gun ever.