2013 is the year of the floating gun. Or it hopefully soon will be, if more games follow in the ace Receiver and HydraDeck's lead. The latter's a sort of tech demo developed by one TeddyOk and, well, you really have to watch the video below. Using the Unreal Development Kit, he's built a first-person cover shooter that requires you to physically crouch to hide behind cover. You can download it here, but you'll obviously need a Rift and a Hydra joystick.