The supercharged Gravity Gun can be activated in normal use by entering the command ” physcannon_mega_enabled 1 “. How do you get the gravity gun in Half Life 2? The single-player portion of Portal™2 introduces a cast of dynamic new characters, a host of fresh puzzle elements, and a much larger set of devious test chambers. Portal™2 is now available for digital download with PlayStation®Move motion controller support along with new motion DLC. Most of these codes will not work unless cheats are activated (sv_cheats 1). Press the ` key (upper-left corner of your keyboard) to open the Developer Console. If you wanna use cheats: Esc -> Options -> Keyboard/Mouse -> Allow Developer Console. If you keep crouching, you will keep flying. Start crouching, and walk out in the direction you want to fly. Walk into the funnel and wait until you stop moving at the top. Walk out in the direction you want to fly.