{{Weapon Infobox
| image=FileAutogun Idle.jpg|250px
| name=Autogun
| affiliation=Combine
| manufacturer=Combine
| model=
| type=Pulse turret
| damage=Very high, almost instant kill
| magazine=Infinite
| maxammo=
| fire=
| ammotype=Dark Energy
| operation=
| rate of fire=Similar to Overwatch Sniper Rifle 
| accuracy=100% (unless target is hidden)
| range=Far
| usedby=Combine
| counterpart=Overwatch Sniper Rifle
| counterwep=Fragmentation Grenade (Half-Life 2)|Grenade
| entity=func_tank_combine_cannon
{{Quote|Well that could be a problem. You hear that autogun going off out there? We normally run supplies out to the White Forest base, but a few days ago the Combine cut off access.|Rebel|Half-Life 2 Episode 2|FileReb chop autogun01to03.ogg}}

The '''Autogun''',''Half-Life 2 Episode Two'' also known as the '''Autocannon''',''Half-Life 2 Episode Two'' commentary is an automated, stationary Combine pulse turret seen in the ''Half-Life 2 Episode Two'' chapter ''Under the Radar'', at Station 21.


*The Autogun seen in ''Half-Life 2 Episode Two'' is used to stem the flow of Zombies passing by that location as well as block Resistance supply runs to White Forest. 

*It has three blue search beams that are quite similar to and behave like Overwatch Sniper Rifles, but it fires a much more powerful shot which drain the player's full health in only a couple of hits. It can also ignite or cut Zombies in half.


The gun is much faster than a Overwatch Sniper Rifle, and hits even harder; it can only be defeated by sneaking around behind it and dropping a Fragmentation Grenade (Half-Life 2)|Grenade into its control systems in its building. The only way to do so without dying is to crawl through the trenches between the wrecked cars in front of it while avoiding Zombies and Headcrabs. While the gun dispatches most Zombies, it often cuts them in half, forcing the player to dispatch the attacking Zombie torso on their own. Going through the small buildings nearby is also required before finally climbing up the side of the Autogun's building. The area is heavily protected; Overwatch Soldiers patrol outside and inside the building. The Autogun can kill Overwatch Soldiers when they are in the line of fire, but it doesn't target them. It also still considers Zombine as Combine units, as it doesn't target them either (they also obviously die when in the line of fire). However this doesn't occur during normal gameplay.

==Related Achievements==
{|class=wikitable style="vertical-aligncenter;" width=50%
!colspan="2" style="text-alignleft"|''The Orange Box Achievements 2 Episode Two|Half-Life 2 Episode Two''
|rowspan=2 width=64px|FileEp2 kill combinecannon.png
!style="text-alignleft"|Gunishment! (5G)
|''Destroy the Combine Autogun in the junkyard.''

==Behind the scenes==
FileCombine cannon 1.jpg|150px|right|thumb|The possible early Autogun model.

*According to Eric Twelker, in order to train players that crouching through the trenches is critical for survival, the team did several things. First, the sequence starts the player in a safe position by forcing them to crouch under the fence to enter the area. Once inside, the player learns the Autogun's behavior by watching how it affects Zombies. Upright Zombies are gunned down, but their torsos are free to roam in the shadow of the junk. Some playtesters believed that while the gun was busy shooting Zombies with its single guns, they would be able to move freely; to counteract this impression, the team increased the number of guns from one to three, making it clear that there was always going to be a gun free to shoot the player.

*According to Martin Otten, the original design for the Autogun sequence involved shutting down the cannon by flipping a switch. That was considered neither obvious nor rewarding, so the team decided to let the player blow it up instead, which gave them another opportunity to use their cinematic physics.

*In the ''Episode Two'' model folder "Combine_turrets" where some of the Autogun models are located, a model named "combine_cannon" can be found. A blocky device set on a tripod, it is probably an early, incomplete model.


FileCombine cannon 2.jpg|The possible early Autogun model seen from behind.
FileAutogun cannon.jpg|Autogun cannon model.
FileAutogun fire.jpg|The Autogun firing.
FileAutogun.jpg|The Autogun firing, closeup.
FileAutogun back.jpg|The back of the Autogun (right), and its control systems (left). 
FileBlack box opened.jpg|The control systems uncovered.
FileAutogun box explosion.jpg|Destroying the control systems.
FileEp2 outland 09 fz half.jpg|Fast Zombie torso in the trenches, safe from the Autogun's reach.

==List of appearances==

*''Half-Life 2 Episode Two'' {{1st}}


CategoryCombine weapons
CategoryPulse weapons
CategoryCombine sentry weapons
CategoryHalf-Life 2 Episode Two