
All three are heavy enough to deal significant damage if pushed, and will be destroyed if pushed into a nearby wall. Manhacks, City Scanners and Shield Scanners can all be held and punted by the gun the first, in particular, can be held by the gun for use as a makeshift chainsaw. In addition to its primary uses, the Gravity Gun can be used in more esoteric ways.The gun must also be constantly trained on the object to maintain the pull, until it has been captured. Outside of a certain range it is able to pull objects closer, but much more slowly and the object is still subject to Earth's gravity. The secondary fire of the Gravity Gun grows weaker with distance.The Gravity Gun is most effectively used as a short to mid-range weapon, since the physics objects it uses for ammunition are affected by gravity once they leave the device's hold. Explosive barrels, in particular, are highly devastating when used with the Gravity Gun, but this can backfire if the barrel is shot by an enemy while being held by the gun. Heavier objects like metal barrels and propane tanks can even kill an Overwatch soldier with a single blast, but conversely, objects such as plastic crates, plastic bottles or wooden pallets will do very little to no damage due to their weaker materials. Depending on the object fired, the Gravity Gun can be one of the most damaging weapons in the game. However, this advantage is balanced by the need to "reload" after every shot, by grabbing a new object. Since it uses physics objects rather than conventional ammunition, there is virtually no limit to how many times it can be fired. Using the Gravity Gun's secondary and primary fire modes in conjunction allow it to be used as a powerful weapon.The gun cannot affect most organic material, though there are a few exceptions. The secondary fire can only pick up lighter objects - mainly those which Gordon himself can carry, with some exceptions - but the primary fire is capable of pushing much larger objects even if the secondary fire cannot affect them. These objects can then either be dropped by pressing the secondary fire button a second time, or they can be launched forward with the primary fire.

The secondary fire pulls objects towards the gun, and holds them just ahead of the device. This is useful in-game for clearing out barriers, or moving objects that cannot be picked up, such as disabled cars. The primary fire releases an energy blast, which pushes the targeted object with a tremendous force.

Alyx introducing the Gravity Gun to Gordon at Black Mesa East.
