Raven Rock

 is the Enclave's main base of operation in 2277. It can be found in the northwestern part of the Capital Wasteland. The base itself is not accessible during freeform play; you arrive here after Finding the Garden of Eden and escape during The American Dream, and the entrance seals behind you. Depending on the player's choices throughout the game, a few named NPC's might be found while moving about Raven Rock. Nathan Vargas from Megaton can be found warning the player character that the Enclave "aren't who they say they are." Anna Holt can also be found in a room near John Henry Eden's office.

The player character may destroy Raven Rock through a speech check with President Eden. This seems to hold little relevance in gameplay as the Enclave presence at Project Purity is just as strong and organized as it would be had the player character not destroyed Raven Rock. The player may inform Elder Lyons of Raven Rock's destruction, but again this only results in dialogue and no visible difference in the Enclave's performance.

Notable Loot
There is an immense amount of loot available at Raven Rock including the rare Tesla Power Armor, Plasma Rifles, Enclave Power Armor, AER9 Laser Rifles and Gatling Lasers.

Also, be sure to grab the Bobblehead: Energy Weapons, located in sector 2C in a room to the northwest.

The Bobblehead is located on the second floor (Raven Rock - Level 2) in Colonel Autumn's room to the northwest. After opening one of the large metal doors, the player will be confronted with two doors, one with two enemies behind it. The Bobblehead is behind the western door. The player should not enter the Control Room before retrieving the Bobblehead, as the doors will lock permanently.

Bugs

 * The outer hatch can be blown off from the outside by small arms fire (but not grenades). If you enter the complex (before The Waters of Life quest), you will be blocked from further entry by an invisible wall. When you leave, you will trigger the event where Colonel Autumn's Vertibirds flee the compound. If you go back and exit one more time, the Vertibirds will be stuck to the ground on top of Raven Rock. Just climb up there and you can study them closely. But you can not do anything to them.


 * Upon returning to Raven Rock after completing the associated quest, one finds Enclave soldiers in fleeing mode. Killing them and looting their bodies is a trivial matter, with various types of Power Armor and Energy Weapons to be found on their corpses. Allowing a few days to pass and returning finds the same soldiers fleeing, along with their power armor free for the taking yet again. If you choose to leave Raven Rock intact, there will be additional guards outside. With this option, there will be at least half a dozen fully-armed Enclave soldiers waiting for you (though the three fleeing ones will not fight back). The loot from this many Enclave troops can be traded to Henry Casdin for hundreds of stimpacks or other various items.


 * It is possible to go back inside Raven Rock! (You will only be able to go as far as the room with Eden in it.)  Right after you exit Raven Rock Level 1, don't go further and activate the outer hatch.  Instead, fast travel to a location and later fast travel back.  The door will be wide open and you can shoot it as mentioned above and jump through the doorway and get back inside.  (Make sure you save before doing this as I am not sure if it works every time, and also I don't know if Fawkes will be in the Underworld and if it effects your chance to have her as an ally or not.)


 * 1 reason Fawkes disappears is that she is trying chase down the enclave soldiers that she is fighting. Another reason Fawkes disappears is that she is trying to run to where you are. So if you fast traveled to the power station nearby, she will already be half way there when you go back to Raven Rock. However, if you fast travel to somewhere far, like the underworld, she won't move. Best way to do this to leave Raven Rock accessible and get Fawkes as a free follower (allowing you to get 6 regular companions):
 * After escaping from Raven Rock to the Capitol wasteland, you will be in a short tunnel. Go forward until you get the "You have found Raven Rock" message. If you have already found it previously, just move forward until the the hatch starts to open, but do not go past the hatch.
 * On your radar, you will see 1 friendly and 3-4 hostiles, the friendly will be Fawkes, here to rescue you. Wait for her to kill all the enclave soldiers. She will then move towards you if you are near, or stop moving if you are too far away. So wait for her to finish off all the enclave soldiers.
 * 1) Once the shooting stops, fast travel to Underworld to pick up Charon
 * 2) Ensure that you have good karma, then fast travel back to Raven Rock. Fawkes will run up, initiate dialog and offer to join you even if you already have a companion. Let her join. You might also want to verify that you can re-enter Raven Rock if you want.
 * 3) Get bad karma, use the fire/re-hire glitch to get Clover
 * 4) Get neutral karma, use the fire/re-hire glitch to get Sergeant_RL-3
 * 5) Get good karma, find Star Paladin Cross use the "I don't suppose I can stop you" line to make her request to join, then accept. Note: If you ask her to join, you will get the "only 1 follower allowed" message and she will not join.
 * 6) Get Dogmeat
 * You now have 6 companions. If you want to, you can kill Dogmeat and use his slot to get another companion.

Appearances
 only appears in Fallout 3.

Behind the scenes

 * Raven Rock Mountain Complex is a real-world government complex that became operational in 1953.
 * is the name of a settlement on the island of Solstheim in the Bloodmoon expansion of Bethesda's The Elder Scrolls III: Morrowind, and, oddly enough, is located near the Raven Rock in Fallout 3 (Northwest corner). It is also referred to in The Elder Scrolls IV: Oblivion by some people on the Waterfront.