In this add-on, the Brotherhood of Steel Outcasts are trying to acquire advanced military tools, and the only way to enter the vault containing these relics is by completing a military virtual reality simulation. However, none of the Outcasts have the correct computer interface (the Pip-Boy 3000) to enter the simulation, so it comes down to the Lone Wanderer to go inside and complete a simulation of the greatest battles of the Fallout universe: the liberation of Anchorage, Alaska from occupying Red Chinese troops. The simulation is set during the Anchorage campaign, which occurred between June 2076, when the T-51b power armor was first introduced, and January 2077, when Chinese forces were completely driven out of Alaska.
Once the add-on is downloaded, the quest objective for Operation: Anchorage will be activated by a radio broadcast stating, "This is Defender Morrill. Any Outcasts listening on this frequency report to sector 7-B, Bailey's Crossroads. This is a high-priority message; backup is needed at our location. Any personnel listening on this frequency, please report at once." A marker will appear on the world map near the Red Racer Factory.
The add-on can be played at any time after the player exits Vault 101 at the beginning of the game. After completing the simulation, the player is free to unlock the armory via the terminal, and also receives Power Armor Training. Also, all of the equipment inside is free for the taking without a karma penalty.
In the simulation, the player is stripped of any equipment and weapons (excluding quest items) and forced to utilize the resources supplied throughout the simulation's environment. The Chinese Red Army is everywhere, and the player first has to secure the surrounding mountainside and then fight their way into the Chinese base. The player has to use a lot of their standard combat skills, along with several new tools that are only available in the add-on. These include interactive strike teams under the player's command as well as unique armor, weapons, and other exotic gadgets. Throughout the simulation, various pieces of intel are also hidden that yield the Covert Ops perk when all are collected.
Interactive objects are blinking red.
The player is also introduced to a new healing system in the simulation: rather than stimpaks, you have health dispensers that will completely replenish your health. ammo dispensers can also be found in many places. Corpses cannot be looted, however; all bodies disappear in a blue-static animation a few seconds after death. (If you are quick, however, you can devour them with the Cannibal perk.) There is no need for looting, however: weapons and armor have extremely high HP values and do not degrade. You are also unable to pick up clutter or open containers; you can only interact with objects that are blinking red and emitting a humming noise. After exiting the simulation, you are allowed into the armory and can grab anything you want.
Opening the armory door spurs a heated discussion between Defender Sibley and Protector McGraw, which culminates in Sibley and most of the other Outcasts starting a mutiny against McGraw and Olin.