Weapons

Half-Life 2 contains several weapons, which are not all available in all modes.

Standard weapons

The following weapons are available in the normal singleplayer mode. All these are also available in HL2DM except when noted.
• Crowbar: the mêlée weapon of Half-Life, and also the first weapon available. In HL2DM the crowbar is weaker but faster than the Stunstick.
• Gravity Gun: Officially called the Zero Point Energy Field Manipulator, the Gravity Gun is a tractor beam–like weapon that does not use any ammo. The primary fire can repel most inanimate objects, allowing these objects to be moved to clear a path, or to harm enemies. The burst itself can also harm some weaker enemies, such as headcrabs. The secondary fire can attract most inanimate objects up to a limit (cars and heavier objects cannot be "pulled"). Held objects can then be launched by using the primary fire, or be used as shields. In HL2DM, the launched objects usually kill instantly. The Gravity Gun heavily utilizes the game's physics engine, and it was originally a tool used by the developers to experiment with and test the physics engine.
• Dark Energy Gravity Gun: late in the singleplayer game, the Gravity Gun receives an infusion of "Dark Energy" from a Combine beam. From that point on, it can also grasp or repel living creatures (killing instantly), and pull heavier inanimate objects. A replacement of the normal Gravity Gun, it is not available in other parts of the game or in multiplayer.
• USP Match 9mm: the first gun available, it is relatively weak but very accurate.
• .357 Magnum Revolver: the second handgun available, it is more powerful and accurate than most other weapons, but ammo for it is quite scarce. It's effective against combine soldiers and zombies, but since ammo is so scarce is should only be used at specific targets.
• MP7A1 Submachine Gun: the first rapid-firing weapon received, this is the primary weapon for close combat. It has a 45 round magazine with 225 rounds in reserve. Secondary fire launches a grenade that detonates on impact. It is also modeled after the real MP7, but with an added grenade launcher, which is purely fictional. (Secondary "tube" on the model)
• Overwatch Standard Issue Pulse Rifle: a powerful assault rifle used by the "Overwatch" (Combine soldiers). The primary fire launches a burst of energy which usually kills with one or two shots. The secondary fire shoots an energy orb, which bounces around the environment for 3 seconds, disintegrating enemies on contact before exploding. The energy orb has caused some stir among HL2DM players, who argue that it is too powerful. The orb can be caught with the Gravity Gun and then launched at enemies.
• Shotgun: the shotgun does high damage at close range, but its broad fire cone makes it weak at a distance. Its secondary fire shoots two rounds at once. This weapon is modeled after the real SPAS-12 shotgun.
• Crossbow: the crossbow is a sniper weapon with high damage and accuracy, but with a slow rate of fire and reload time. Secondary fire activates a zoom mode. The launched bolts are affected by gravity.
• Rocket Launcher: this weapon fires rockets which must be guided it in flight using a laser pointer. Up to three rockets can be stored in the magazine.
• Grenade: a frag grenade that explodes a few seconds after being thrown. Secondary fire rolls the grenades over the floor instead of throwing them in an arc. Thrown grenades can be caught and relaunched with the Gravity Gun.
• Pheropod ("Bug Bait"): these are small pods of pheromones which can be used by the player to command swarms of antlions. The primary fire throws the pods and commands the antlions to go to the target. The secondary fire squeezes the pod to recall the antlions. Pheropods are ineffective against the larger, more aggressive antlion guards. Thrown pods stun enemies for approximately 5 seconds, but do no damage (unless you count the hordes of ravenous antlions it summons to the affected enemies). This weapon is not available in HL2DM.

HL2DM weapons

HL2DM includes two weapons which are not available in the singleplayer game:
• Stunstick: in the singleplayer game this mêlée weapon is only available to Combine Civil Protection units. It inflicts no damage, but stuns the player: the view wobbles and goes momentarily red. The stunstick has been introduced in HL2DM, where it does inflict damage. It is more powerful than the crowbar, but much slower.
• SLAM: the SLAM (Selectable Lightweight Attack Munitions) originally only appeared in the beta version of the Half Life 2, and was left out of the single player game. This mine weapon is now included in HL2DM. The primary firemode varies depending on whether the player is facing a surface or large physics object, or is targeting open space. When facing a surface the weapon will stick to the surface and emit a laser beam, which will detonate the SLAM if it is broken. When not facing a surface the mine is thrown, but does not explode. Multiple mines can be deposited. The secondary fire then becomes a detonator for all thrown mines. Mines not attached to surfaces can be repositioned with the Gravity Gun: when launched they become light explosives which can be used to knock physics objects into other players.

Additional weapons
• Overwatch light machine gun: A modified version of the Pulse Rifle, this stationary weapon has an unlimited supply of ammunition and does not have to be reloaded. It is usually found in an entrenched position, and can be operated by both the player and Combine troops.
• Overwatch attack helicopter turret: this armor-piercing, airboat-mounted weapon is used near the end of the Water Hazard sequence, and can destroy Combine vehicles. It is the same weapon used by Combine helicopters. It constantly replenishes its own ammo at a rate slightly slower than its firing rate, and has a maximum capacity of 100 rounds. This weapon can also be fired when zooming.
• Tau cannon (vehicle-mounted): This weapon, attached to the buggy, functions similarly to the Tau Cannon from Half-Life. It fires laser-like beams which can optionally be charged with the secondary fire button for increased power.
• Annabelle: "Annabelle" is the modified shotgun used by Father Grigori in the Ravenholm chapter. It has more power per shot than the standard shotgun, with a lower rate of fire, and is also very effective at long range. The only way to acquire the Annabelle is to open up the console and type "Give weapon_annabelle". (The Annabelle uses ammo from your .357 Magnum so conserve ammo)
• Alyx Gun: Alyx Vance has her own special weapon, which can be obtained by typing "give weapon_alyxgun". This may not always work and may cause stuff you don't want to happen.