"Obviously, with the addition of a new expansion, the addition of new guns was also inevitable. One of the big weapons that reappeared from the Doom franchise is the classic double-barreled shotgun which holds a special place in the hearts of many old-school fans. It's every bit as destructive as you may hope, but the reloading is somewhat hampering. You use up lots of shells and have to reload after every shot. There's also a physics-based weapon called the Ionized Plasma Levitator (also known as "The Grabber"), a device that can move, catch and throw objects or small enemies, as you battle through the onslaught of evil sent to hunt you down. Its main difference from Half-Life 2's gravity gun is that it can capture and redirect large projectiles (like fireballs and plasma balls, as opposed to bullets and grenades)."