Who Dares Wins

 is a Fallout 3 quest and achievement that is added to the game in the Broken Steel downloadable content pack.

Walkthrough
Well, this is it. The last of the main quests. Tristan has tasked you with infiltrating the Enclave's final, massive base at Adams Air Force Base, and destroying it with an orbital strike. The quest begins at White House Plaza. The Utility that leads to the White House crater also has a connection to the Presidential Metro, which should lead directly to Adams. Reach White House Plaza through any means you have, and enter the tunnels. The Metro is crawling with Mister Gutsys and Sentry Bots. You'll proceed down several different tunnels before meeting with M.A.R.Go.T., the protector and dispatcher of the Metro. The robots (and M.A.R.Go.T, to some extent) are initially hostile, but if you pass a difficult speech or science check, or present a valid Senate Employee ID, M.A.R.Go.T will mark you as a friendly, and you'll have a chance to pump her for information.

Contain the Security Breach
Among other things, you can learn that the train to Adams is offline, do to a "security breach", which resulted in "the forced removal of a main fuse". M.A.R.Go.T can repair the fuse and train, but only if the breach is contained. According to her, the breach has depleted 22% of the Metro security units, have no internal body heat, and are exuding lethal levels of radiation. The Metro units should be able to handle the breach on lower levels, but higher levels can result in several more deadly foes, which will make short work of the Sentry Bots. If you aid in containing the breach, the Presidential Sentinel Unit will repair the Adams tram for you, if not, you can find the Main Fuse on its body, and can use it and a repair check to fix the train yourself.

Enter Adams Air Force Base
After a quick ride on the train, you'll wind up in the Adams Metro station. Continue through the tunnels, and you'll encounter the first of many Enclave Soldiers here at Adams. Reach the surface, climb the stairs, and take a left to find the "Resupply Crate" Tristan mentioned. Inside is a fully repaired Tesla Cannon, 100 Electron Charge Packs, and your Orders, contained within a voice recording, courtesy of Tristan. Proceed to the right, and begin the long trek to the Mobile Base Crawler. The path is full of Enclave troops, regular and Hellfire, banks of Mark VII turrets, Deathclaws and several combat ready Vertibirds. Make use of the Tesla Cannon to destroy the Vertibirds in one shot, and anything else, guns, grenades, followers, to stave off the Enclave hordes. As you approach your next objective, you'll begin to see Vertibirds gunning down the runway, lasers firing in all directions. This is the "distraction" Tristan promised, but it doesn't seem to work very well.

Find the Access Terminal to lower the ramp on the Mobile Platform
Find the Access Terminal at the top of the flight control tower, at the other end of the base. When you go through a destroyed hangar and enter to a large field in front of you is a building with a radar on it, the tower control building is to the left once you exit the destroyed hangar. There are stairs on the west side of the control tower building, use these to climb to the roof and head towards the tower, there will be a door that will allow you to enter the control tower. You can alternatively enter the building from the ground floor, avoiding the turrets on the roof. Once inside use the stairs to go to the very top of the tower and use the access terminal to lower the ramp, granting you access to the Mobile Base Crawler.

Enter the Enclave Mobile Platform
Exiting the flight control tower, head down the stairs and take a left, heading through what was previously an Enclave Repulsion Field. Then you will see a big building with a radar disk on it. That is the Mobile Base Crawler. There is a small ramp leading up to the door, so head up there.

Destroy the Enclave Mobile Platform with an Orbital Strike
The first thing you come across is an Enclave Repulsion Field. Using the terminal to the left, you can deactivate it (Science 80), set a timed charge (Explosives 50), or smash the control panel. Smashing the panel will cause an explosion, which will damage you, as will setting the charge. The difference being that you have time to escape. Either way, the field will still be partially active, and will cause damage by passing through it. Turning the fields off will be quite harmless. Turning left will introduce you to Enclave Squad Sigma after alarm goes off. Turning right and heading into the repair bay yields plenty of ammunition, as well as an encounter with Stiggs, who fixes the robots. Talking with him gives some great information:
 * The floor above is the Deathclaw research facility, so there may be one or two left.
 * There are only a few Enclave aboard compared to the usual amounts.
 * The facility is patrolled by Robots, who are all controlled through a mainframe, located on the floor above, in the middle.
 * To reach the Satellite Tower, you have to reach the Central Control Area, then to the launch platform. After the platform, you'll probably have to fight a lot of Enclave to reach the tower.

Heading up the ladder at the back brings you to the Deathclaw Research facility. Heading straight through the door ahead,and looking right and then round the corner to the left a little is a Deathclaw. If you got the Deathclaw Control Scrambler then release him, and let him wander, killing for you. Upstairs you can find the Slo-Burn Flamer. From entering, going upstairs to the front-left corner you will find the medical bay, and to the right, access to the mainframe. Hacking the mainframe requires 75 Science (Hard). The terminal allows you to shut down the robots, scramble the targeting parameters, or (using the Robotics Expert perk) target the Enclave. A terminal across from the mainframe allows you to unlock interior doors, exterior doors, and the armory, where you can find an alien blaster in one crate (locked hard) with some power cells. Head towards the launch pad, using the ladder at of the mainframe room. Note that enemies on top of and around the Mobile Platform will respawn occasionally, weapons and ammo on previously killed enemies may also respawn, so if you are looking for a particular kind of loot that is common on Sentry Robots or Enclave Soldiers you may want to exit the Mobile Platform and re-enter it a few times, just to increase the already huge supply of loot available before blowing it all up.

If you were able to set the Enclave as targets at the mainframe, then be happy! There are plenty of turrets and Sentry Bots up here that pretty much take care of the Enclave for you. Head to the Satellite Tower. Once inside, head to the top, to the terminal. Make sure you've thoroughly searched the crawler, since there's tons of ammo and weapons then hit 'fire Payload', then chose your target:


 * Preset Target 01: Citadel
 * Preset Target 02: Project Purity
 * Preset Target 03: Megaton
 * Preset Target 04: Rivet City Carrier
 * Preset Target 05: Adams AFB Platform

Only two of the targets can be fired upon: Adams AFB Platform, or the Citadel. Once you make your choice, unlock the door from the active terminal to your right, and head through the door at the top back outside, where Sentinel Lyons shows up in a Brotherhood of Steel Vertibird to get you out. Hop on, and away you go!

If you chose the Citadel: You are rewarded with 1000 negative karma, and on the flight back the pilots seem to think the Vertibird is malfunctioning when the Citadel won't respond to radio. Upon landing and seeing the smouldering ruins, they quickly pick up that it was you, and attempt to kill you, deeming you a traitor. Any other Brotherhood of Steel members you meet, like in the Washington Monument, Arlington Library, and the Jefferson Memorial Purifier, will be hostile as well.

If you chose Adams AFB Platform: You are rewarded with 1000 positive karma, and the Vertibird lands a little off Adams AFB to allow you to watch the missiles strike. After hopping back on the Vertibird, you are taken to the Citadel, where Elder Lyons is waiting with a heart-warming speech of thanks.

Trivia

 * "Who Dares Wins" is the regimental motto of the British Special Air Service and the Australian Special Air Service Regiment
 * If you look closely at the defunt security cameras in the Presidential Metro, you can see that the "eye" of the camera is identical to the Eye of HAL 9000, from 2001: A Space Odyssey. You can also see cameras in Vault 101 and the demo Vault in the Museum of Technology.

Videos
thumb|300px|left|Ending 1, Blow Up The Enclave Satellite Control thumb|300px|right|Citadel destruction and reward

Bugs

 * Sometimes after clearing out the ghouls in the metro, the sentinel robot with the fuse will not fix the tram. The solution is simple. Kill the robot and take the fuse yourself. (Note: if you stopped the robots from attacking you at the computer, killing it will make them hostile)
 * During the assault on the Mobile Base Crawler the Brotherhood of Steel participating in the battle can appear without their armor. Clad in only underwear they are quickly dispatched by the Enclave.
 * (Xbox360) When I ran through Who Dares Wins, the armor bug occurred for both sides, so that the Enclave and the Brotherhood appeared without armor. The enemies would still have the armor in their inventory, but did not wear it.  I attempted to reverse pickpocket some tesla armor onto a brotherhood member.  While he did not wear the armor I gave him, a couple minutes later both the Brotherhood and the Enclave were wearing their correct armor once again.