The Guns of Anchorage

 is a Fallout 3 quest that is added to the game by the Operation: Anchorage downloadable content pack.

After finishing the quest Aiding the Outcasts you find yourself in the simulation of Operation: Anchorage. All your items are removed (for now, you get them back at the end of the simulation), instead you receive a Silenced 10mm Pistol, a Trench Knife and Winterized Combat Armor.

Inside the simulation, all usable items glow red and emit a sound when you approach them. Your armor and weapons' condition will not degrade. Health and ammo can be replenished using Health and Ammo Dispensers. All enemies vanish in a blue flash of light when they are killed.

Objectives and walkthrough
The main objective of the "The Guns Of Anchorage" is to knock out a set of three artillery guns.

Like all quests in this DLC it's very linear. Be aware though that there is a total of 10 Intel Suitcases to be found in the 3 quests inside the simulator and that you need to find all of them to gain the Covert Ops perk. These suitcases are usually slightly off the path or behind (very easy or easy) locked doors.

Infiltrate the Chinese artillery site
You start off on a mountain with Sergeant Montgomery in your face. He says he is glad that you made it (unlike your fellow paratroopers) and explains that your objective is to take out the artillery guns located here. To do this, you should first infiltrate the Chinese Artillery Outpost and meet him there. Montgomery then proceeds to climb up the cliffs.

Lacking his cat burglar abilities, you have to take the long way. Follow the path to fight your first Chinese soldier who should be very easy to kill. Fighting more of his comrades along the way, keep following the path and head over the pipes until you reach a cavern.

Meet Sergeant Montgomery
Inside the cavern there is a small firefight occurring and you can find a Gauss Rifle. In a room upstairs, Montgomery drops from the ceiling and rejoins you. He serves as your companion from this point on.

Destroy all 3 artillery guns
Leave the cavern and head towards the Artillery lookout post, which has two bunkers and one big Chinese flag. Take out the guards and make your way into the building.

Inside the building you eventually pass a warehouse where Montgomery mentions chimera tanks, fight through the guards and proceed into another warehouse where you first encounter Crimson Dragoons, Chinese stealth units. There are two of them in this location so quickly dispose of them and proceed upstairs and outside.

Outside again, you are on a mountain top right next to where the guns are firing. Head up to the first one (each gun is guarded by 2-3 soldiers) and plant the first charge. Before you can enjoy the explosion, you have 20 seconds to get a fair distance away from the rigged gun. Repeat the process on the other two.

Once all of them are destroyed you are told to report the General Chase in the U.S. Army Field Headquarters.

Report to General Chase
You are teleported away from the mountain top and find yourself right in front of the general. This automatically concludes the Guns of Anchorage.

Intel Suitcases
4 of the 10 Intel Suitcases required for gaining the Covert Ops perk can be found during this mission. Please refer to the main article for their locations.

Trivia

 * The Guns of Anchorage is most likely a reference to the movie The Guns of Navarone, a World War 2 film where troops have to destroy massive guns on the Island of Navarone.

Glitches

 * If you attempt to pickpocket the simulation's Chinese soldiers, you lose karma.