For the Republic, Part 2

For the Republic, Part 2 is a main quest in Fallout: New Vegas.

Detailed walkthrough
After completing the first two NCR quests, (Things That Go Boom and Kings' Gambit), head to Hoover Dam and talk to Colonel Moore.

The Great Khans
The Great Khans are a group of violent, and tough soldiers that have a grudge against the NCR. You can get them to cooperate by simply making a truce to them.

Colonel Moore will ask you to destroy the Great Khans. You may accept the task, or reject it and take a more diplomatic approach.
 * Travel to the Great Khans' base in Red Rock Canyon.
 * Enter the Great Khan longhouse, which is up a cliff on the right, and is the only non-tent building (It will be marked on your PipBoy map).
 * Option 1: Destroy the Khans. The player can attack Papa Khan in the longhouse. The other Khans present will become hostile. The player must then kill at least 15 other Great Khans to complete the quest.
 * Option 2: Complete Oh My Papa. Speak to Papa Khan in the longhouse, then talk to Regis, who is sitting next to him. After you speak to him inside the building, go outside, and he will accost you. He tells you that if you can convince influential members of the Great Khans to break the alliance with Caesar, they will convince Papa Khan to do so. Accepting his offer begins the quest. Another resolution to Oh My Papa involves assassinating Papa Khan. You will need to talk to Colonel Moore first before doing this.
 * After either killing all the Khans or completing Oh My Papa, return to Colonel Moore and inform her that the Khans are either destroyed, moving out of the Mojave, planning a suicide mission during the final battle, or willing to ally with the NCR.
 * If the Great Khans agree to help the NCR and you have not spoken to Colonel Moore about it, then the Khans and NCR may fight each other.

The Omertas
This portion of the quest leads you through How Little We Know, Colonel Moore will inform you about the Omertas and send you to find out why they have been so silent lately.

Cachino
'''If the player bypasses the first leg of the quest (talking to secretary Liza O'Malley) and speaks to the receptionist directly, a bug may be introduced making it impossible to complete this quest. However, this can be countered by killing Clanden. Finding out what Clanden specializes in is a none optional objective after talking to Cachino, Killing him Fails the quest "How little we know" but allows you to carry on the quest "For the Republic part 2".'''
 * Secretary (Liza O'Malley) at the NCR Embassy will direct you the player to see the receptionist at Gomorrah.
 * The player must speak to the receptionist, then to Cachino. After speaking with him, the player must find information to use against him.
 * Cachino's journal can be pickpocketed (from Cachino) with a high-enough Sneak (or using a Stealth Boy.)
 * Cachino's journal can also be taken from Cachino's desk in his room.
 * By talking to the receptionist, the player may obtain a key to Cachino's room for a fee of 300 caps, free with a Strength check of 8, or 200 caps with a barter check of 55.
 * Confront Cachino about the journal's contents. He will tell the player information about the Omertas and recommend that the player speak to Troike or Clanden.
 * By passing a Barter check of 60, the player can convince Cachino to pay 200 caps. (The player can tell Cachino to pay 100 caps in addition, afterward.)

Troike

 * Speak to Troike and mention Cachino.
 * Convince Troike to help you take down the Omertas
 * If the player can pass a Speech check, the player can lie to Troike to convince him (This will cause a loss of Karma)
 * Troike will tell the player that he cannot help until his debt is settled with Big Sal
 * By passing a Barter check of 45, or a Speech check of 53, the player can convince Big Sal to settle the debt
 * Another option is to go to Big Sal's Office above the bar in 'Brimstone' and hack either the terminal, or pick the lock on the safe.
 * Troike will eventually suggest using Thermite to destroy the Omertas' weapons cache.
 * By passing a Speech check of 70, the player can convince Troike to plant the Thermite. He will succeed, but he is caught by the Omertas and is killed.
 * Otherwise, Troike will give the player the thermite to plant themselves. The thermite is ignited using the detonator on the wall near the door to the weapons cache.
 * Return to Cachino to report the destruction of the weapons

The Bosses

 * The player will now be informed that they will have to "deal with" the bosses of Gomorrah.
 * By passing a Speech check of 80, the player can convince Cachino to take care of the bosses himself.
 * Otherwise, the player will be supplied a sawed-off shotgun to aid Cachino in a battle against the bosses.
 * By passing a Speech check, the player can convince the bosses not to become hostile
 * Also by passing a Speech check and then lying, the player can convince the bosses to attack each other.
 * Once the bosses have been dealt with, return to Moore.

Mr. House

 * Colonel Moore tells the player she wants Mr. House out of the picture.
 * Return to Lucky 38 and take the elevator to the penthouse level.
 * Use a terminal to the left of Mr. House to open the antechamber. To do this you need 75 science, the Lucky 38 VIP keycard (which can be found on Chief Hanlon's desk in Camp Golf or in H&H Tools Factory), or the platinum chip. Doing so will result in all the Securitrons in Mr. House's suite becoming hostile.
 * Doing so will cause you to fail the quest The House Always Wins
 * If you are fast enough you don't need to deal with the Securitrons
 * Enter the antechamber, and activate the terminal near the elevator to unlock the elevator to the control room
 * Activate the terminal in the control room, and choose to "Unseal LS chamber" to expose Mr. House's body.
 * Go behind the terminal and speak with Mr. House
 * Return to the control room terminal and select an option. Doing so will result in failing The House Has Gone Bust!, and all options result in Negative Karma.
 * Disable Cerebral Interface: disconnect Mr. House, but keep him alive
 * Kill Mr. House (note that if the player has the Gun Runners' Arsenal DLC installed, doing this with a 9 iron or Nephi's golf driver will award 500 additional XP.)
 * Take the elevator back to Mr. House's suite and return to Moore at the Hoover Dam. The player will receive 200 XP and gain NCR fame. (The Securitrons will no longer attack you when you return to the penthouse)

Brotherhood of Steel

 * Travel to the Hidden Valley bunker at Hidden Valley.

Positive reputation with the Brotherhood of Steel

 * If the player has completed Still in the Dark, stayed on good terms with the Brotherhood, and McNamara remains Elder, a truce can be signed between the Brotherhood and the NCR. Go to McNamara and tell him the NCR wants them destroyed, he will offer a Truce. Return to Colonel Moore and speak to her about the offered truce. Doing so will complete the quest and begin You'll Know It When It Happens, but will earn the player minor infamy with the NCR, this method should work if the player has completed all main BoS quests as well.
 * It is possible that you will not be able to initiate dialog with Elder McNamara if you are in between Still in the Dark and Eyesight to the Blind. If this is the case you may need to exit the bunker and wait 2–3 days in order to be able to get any other dialog than McNamara being "too busy to talk".

No previous reputation with the Brotherhood of Steel
Or you can just kill first knight along with others.
 * If the player has not interacted with the Brotherhood of Steel, they must go through an orientation by convincing a ranger in an adjacent bunker to leave, or enter the bunker with Veronica in your party.
 * IT IS NOT TRUE that you must go through the orientation to convince the NCR ranger to leave. When you first walk into the Brotherhood of Steel bunker, the doors will open. At this point, you can back up. As the Brotherhood of Steel member slowly walks toward you, it is possible to walk around the very large crates in the room and avoid talking to him. Then, walk straight down to the bunker. You will still be confronted by the next knight however, but you will have all your gear and your companions. Choosing to fight him will start an easy 3v1 if you have two companions. Then, you can hack the terminal to make the turrets attack the BoS, proceeding to finish the rest of the BoS yourself, and taking the keycards from 3 members allowing you to set the bunker to explode. (the knights who you were supposed to confront, but avoided by going around the crates will no longer be outside when you escape).
 * Waiting until late at night will cause several brotherhood paladins to spawn at which point a player with even a moderately high sneak skill can pick one of the paladins pockets to acquire a keycard to the bunker (no Karma loss will be suffered). Putting on a Stealth Boy before talking to the paladin at the entrance will mean he initiates dialogue with the character anyways. However, refusing to hand over the players weapons will turn the brotherhood hostile but the paladins will not see the player upon closing dialogue so long as the players in sneak. Quickly heading down to L2 of the bunker and killing one of the Brotherhood scribes quietly will allow the player to use the scribe's robes as a disguise which automatically makes Brotherhood rep. neutral. Depending on the players sneak they can go onto either pickpocket or kill all non-player characters necessary for acquiring all the cards for the self destruct sequence.
 * Note that the above tactic becomes viable due to the fact that while the self destruct sequence is active the brotherhood will not fire upon the player since they are still disguised as a scribe. Also note that certain higher up brotherhood members (i.e. Elder) will see through the players disguise regardless.
 * If Veronica is in your party the Brotherhood will not be hostile even if you are dressed as an NCR member
 * If the player warns the Ranger in any way about the Brotherhood, the Brotherhood will become hostile and enter the bunker to kill the player.
 * If reputation with the NCR is too low, the Ranger will not talk to the player, and the player will either have to take all the supplies and smash the radio in the bunker that the ranger is staying in or kill the ranger. Make sure you gather your weapons from the locker in the bunker. You can also rig his radio to explode.
 * You do not need to blow up the Brotherhood Of Steel bunker, you only need to kill all the members.

Find the keycards
After you have gained the Brotherhood's trust, you can enter their bunker. Once you have access to the bunker, you need to steal 3 keycards from 3 main personnel in order to get the password for the self-destruct sequence or have a Science skill of 100, at the same time you can look for a bunker key for your escape later on. It is suggested that you save before stealing from each character in order to avoid killing for the keycard if they catch you stealing. You need to go level L2 of the bunker, where you can find Elder McNamara, Head Paladin Hardin (Or Head Paladin Ramos based on your choices) and Head Scribe Taggart. Head right, where you can find McNamara, who is the easiest to steal from and can be stolen as he is sitting in his chair. Hardin can be found to the left of this room in one of the three bedrooms. He will be in the room sleeping, standing, or on his computer. Crouch, wait until you are hidden and then steal his key card. Go back towards the door to L1 and go all the way up the left hallway this time. At the end is the self destruction room, where you will also find Taggart. For Taggart, you may need a Stealth Boy as the only time you can steal his card is when the girls view is blocked by the tower in the middle of the room. If Cassidy is your follower then she will talk to the girl in the room, when she is distracted you can swipe his card. However if all cards aren't collected, access may be denied.

If you are unable or do not want to waste time picking the cards and your science skill is very high you can hack the very-hard terminal to start the self-destruct sequence. Science (100)

Activate the self-destruct sequence
Once you have all key cards, return to the room where Lars Taggart is and obtain the password from the Override Code Generator terminal(green) next to the actual self-destruct terminal(blue). Now use the code on the self-destruct terminal to destroy the bunker. After activating the self-destruct sequence with the password, you will become a villain in the eyes of the Brotherhood. It is always good to have Stealth Boys keyed to a fast action slot, but you may not have to do too much fighting to get out if you set charges of C-4 along your escape route. Before beginning the sequence be sure to pickpocket the guards protecting the Elder on the other side of L2 and steal a key so that you are able to leave the bunker. If you do not steal a key, you must lockpick the final door (Lockpick skill of 100). Now begin the sequence and make your way to L1.

After leaving the bunker, the bunker will explode and there is a chance that there will be 5 paladins waiting to kill you before you can return to Colonel Moore.

Alternative
Alternatively, you can kill everyone inside the bunker, after which you will get the message that the quest is complete. An easy way to clear level one is to go to the office on the left and kill Paladin Ramos. Then with a science skill of 75 or more, hack the computer on the wall and set the turrets to attack registered Brotherhood personnel. This will take care of almost all of the people on level one. Continue to level two and finish off the rest.

It is possible to only kill the named characters in the bunker to complete this quest.

Protecting President Kimball
Moore wants you to talk to Ranger Grant about protecting President Kimball during his visit to Hoover Dam. You must now complete You'll Know It When It Happens, and return to Moore accepting to fight for the NCR. A marker will say to go directly to the stage after talking to Moore. If you stay on the stage, or go near the veteran rangers, NCR will shoot at you (even with "full access"). Your options are as follows:

1. Stay near the back until a suspicious character enters the area, then crouch behind him. Here you have the option to pick pocket him and see that he has a fail safe explosive device. The player has the option to then take the device back to Grant. Once this is done Grant will tell you that his rangers will deal with him, however when the rangers approach the man, he pulls out a combat knife and immediately kills one causing panic (If you ask Grant additional questions, prior to going outside and waiting for the president, you can have Grant give you full access which allows you to go to the Helicopter Pad and draw and even use your Weapon. You only need to be "liked" or better by the NCR prior, for this to work). If you leave this man alone during the speech then legion snipers will kill the ranger stationed in the first tower (the one behind the president), and attempt to assassinate the president, kill them and then use the radio to inform Ranger Grant about the attempt, he will then call off the speech. As the president is being evacuated he will be attacked by a legion member disguised as an engineer, he must be killed before he reaches the president as he can kill Kimball in a single hit.

2. As the president arrives, you can persuade the guard (Speech 50) to go onto to the helipad. If you have previously been granted full access to all areas by Ranger Grant a speech check isn't necessary. Once the Vertibird arrives, you can search it. Doing so you will find a bomb (repair or explosives 50) which you defuse. After telling Ranger Grant of this, he calls the speech off, shoots the engineer responsible for planting the bomb and gets the president back on the Vertibird. This completes the quest.

3. Talk to the suspicious engineer who will stand to the left of the crowd near the sandbags. He will turn hostile and start running. By then you can shoot him.

4. If Rex is a companion, then after talking to Ranger Grant go the roof to await the presidents arrival. After the president lands and leaves the roof the engineer will approach the vertibird and Rex may or may not growl. Talk to the engineer before he gets to the vertibird and choose the dialogue options “My dog here doesn't like you” and “Maybe I should tell the MP's”, which turns the engineer hostile, forcing an immediate evacuation of the president and completing the mission. Alternatively, if you at least have the first rank of the Animal Friend perk you can borrow the NCR guard dog on the nearby street.

-See You'll Know It When It Happens for more details.

Bugs

 * If the Courier previously completes You'll Know It When It Happens, an optional mission in Yes Man's Wild Card: Finishing Touches, it will prevent the Courier from speaking to Grant and completing the quest.
 * FIX : In console type:
 * If the Courier brokers a peace deal between the NCR and the Brotherhood of Steel or Great Khans while wearing NCR-, Great Khan-, or BoS-specific faction armor, members of the formerly opposing faction will still be hostile towards the Courier until the faction armor is removed.
 * If you talk to Regis about his opinion on NCR the objective "Talk to Colonel Moore about a Great Khans/NCR alliance" is added, however there is no speech option with Moore regarding this if your fame with the Great Khans is too low.
 * Completing the quest Oh My Papa doesn't always update the quest log for For the Republic, Part 2 to tell you to go back to Colonel Cassandra Moore.
 * For the ps3, the quest was made to continue by instead killing Papa Khan and the requisite 15 great khans to advance the quest by wiping them out.
 * FIX: Use the following console codes to advance the quest
 * If the player does not talk to Liza O'Malley in the NCR Embassy before talking to the receptionist in Gomorrah the quest may be bugged. This can occur if both How Little We Know and For the republic, Part 2 is active. Talking with the receptionist first will then advance How little we know and lock For the Republic, Part 2 in a bugged state where you are unable to talk to Colonel Moore. This can for instance occur if you are given How little we know from Mr. House but decide to work for the NCR instead.
 * FIX: type in the console - quest will be started over, but will just talk through the dialogs and be able to continue the quest as normal.
 * FIX: Alternatively, use these console commands to fix the bug. (Note: They must be entered in this order)
 * If you foiled the Omerta's plans:
 * If you helped the Omerta's plans:
 * Once you are up to the point of finishing the quest, and you enter the Hoover Dam you could get locked in. This can be fixed by either re-loading a saved state before you entered the Hoover Dam or by going to the Hoover Dam power plant 04 and finding the door which leads to the Dam's shut off valve. Once outside you can fast travel to any location.
 * Once you talk to Cassandra Moore about the Great Khans for the first time and leave the Hoover Dam you may be shown the message "You cannot wait in this location" as if you still were in Hoover Dam.
 * Accessing the Brotherhood Bunker with Veronica as a companion while wearing NCR faction armor will sometimes prevent the BoS from being hostile towards you while you are wearing the NCR faction armor.
 * If you helped the Omerta's plans:
 * Once you are up to the point of finishing the quest, and you enter the Hoover Dam you could get locked in. This can be fixed by either re-loading a saved state before you entered the Hoover Dam or by going to the Hoover Dam power plant 04 and finding the door which leads to the Dam's shut off valve. Once outside you can fast travel to any location.
 * Once you talk to Cassandra Moore about the Great Khans for the first time and leave the Hoover Dam you may be shown the message "You cannot wait in this location" as if you still were in Hoover Dam.
 * Accessing the Brotherhood Bunker with Veronica as a companion while wearing NCR faction armor will sometimes prevent the BoS from being hostile towards you while you are wearing the NCR faction armor.

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