Oh My Papa

Oh My Papa is a side quest in Fallout: New Vegas.

Quick walkthrough

 * 1) (Optional) After completing Kings' Gambit, speak with Colonel Moore at Hoover Dam. She will ask you to assassinate Papa Khan. You may accept the task, or reject it, and instead continue with a more diplomatic approach. (Completing this step first will give the added options of having the Great Khans join the New California Republic or killing Papa Khan for them.)
 * 2) Go to Red Rock Canyon, enter the only non-tent building in the area called 'Great Khan Longhouse'


 * 1) During the daytime you will see Regis, Papa Khan and Karl sitting and eating behind a long table.
 * 2) Talk to Papa Khan. Exhaust all chat options until a long sentence asking Papa Khan to abandon the alliance with Caesar's Legion appears. He will refuse regardless.
 * 3) Exhaust all chat options with Regis and Karl.
 * 4) Exit the Longhouse; Regis will speak to you about how to convince Papa Khan to ally with NCR instead of the Legion - obtaining the support of the 4 advisers (Regis, Jack, Diane and Melissa) & discrediting Karl.
 * 5) To obtain Regis' trust, you need to find him proof that the Legions make slaves of their allies. Stealing Karl's journal from his footlocker and using it to disgrace him in front of Papa Khan will gain you Regis' support at the same time (using Speech to disgrace Karl will leave you unable to use Karl's journal for Regis' support). Proof can also be found in Caesar's tent in his fort. It's a slave ledger that you will find on one of the tables in Caesar's tent.
 * 6) To obtain Jack & Diane's trust, you only need to convince one of them. They are located due North, through the canyon at the Red Rock Drug Lab Either pass a Speech check of 60 with Jack or find Anders for Diane. He is in Cottonwood Cove, crucified at the entrance of town.
 * 7) To obtain Melissa's trust, simply visit her at the Great Khan Encampment and tell her that women aren't allowed to serve in the Legion.

Note: The fastest way to complete this quest, and get the Khans to ally with the NCR, is to follow steps 1-4, then:
 * Exit the Longhouse, which triggers a conversation with Regis. Exhaust all conversation options, one of which will lead to Regis saying that if Papa Khan was dead, he'd be the new leader, and would probably ally with the NCR.
 * Talk with the Colonel at Hoover Dam.
 * Complete the quest using the option that says something about "making your own glory". Afterwards, ask Papa Khan to ally with the NCR. After you get denied, choose the bottom option.
 * Talk to Regis and ask him about what he thinks about an NCR partnership.
 * Wait till night (1-2 AM), run around behind the Longhouse and pick the Hard locked door to Papa Khan's bedroom. You can also pickpocket his room key by crouching behind him when he's seated at the table and after Karl is dealt with. Once inside, hide, then reverse-pickpocket a grenade or C-4 on him or you can use the Mister Sandman perk on him while he sleeps or you could use any silenced weapon.
 * Find Regis in his tent and follow the conversation. His tent is located near the big fire with the brahmin. It has some skulls in front and a NCR-flag inside.

Detailed walkthrough
Colonel Moore can be found at Hoover Dam. She will ask you to assassinate Papa Khan. You may accept the task, or reject it, and instead continue with a more diplomatic approach. To start with Colonel Moore, the quest series that ends with Kings' Gambit will need to be completed so that For the Republic, Part 2 will trigger. Otherwise, she'll just tell you to go away.

Alternatively, this quest can be triggered by simply entering The Great Khans' Longhouse in Red Rock, exhausting speech options with Papa Khan inside it, then leaving the longhouse to trigger the quest opening conversation with Regis.

Find Regis Evidence that Caesar will annihilate the Great Khans:

To convince Regis you need to give him a book called Legion slave ledger found in Caesar's tent at the Fort. Stealing Karl's journal also works. The journal is found in the footlocker by his bed. Note that if Karl is disgraced through Speech, you will be unable to use his journal as evidence to gain Regis' support. If you have already gained Caesar's infamy you can wear legion armor and use turbo or a Stealth Boy to get the ledger, even if you have killed everyone at Cottonwood Cove you can still use the raft. Note that once past the drawbridge, it is very hard to sneak all the way to the tent past the guards and legion mongrels even with legion armor.

Convince Jack and Diane to speak out against Caesar:

You need to only convince either Jack or Diane to complete their objective. They are located in the northwestern area of Red Rock Canyon, at a location marked Red Rock Drug Lab. Jack can be convinced via a Speech check. Diane requires evidence that Caesar is hurtful to drug runners. She can be convinced by finding Anders for her, in the side-quest Aba Daba Honeymoon.

Convince Melissa to speak out against Caesar:

Melissa is found in the western part of the Quarry Junction area, at a location marked Great Khan Encampment. Simply telling her that women are not allowed to serve in the Legion will convince her to speak against Caesar.

OPTIONAL: Find a way to disgrace Karl in front of Papa Khan:

With high enough Speech (you'll need at least 75 to get through all 3 speech checks), you can provoke Karl into revealing his true feelings about the Khans. Do this while inside the Great Khan Longhouse, with Papa Khan also present. You may alternatively tell Papa Khan about Karl's journal. Either way, the Great Khans will proceed to kill Karl, and the optional objective will be completed. If you provide Papa Khan with Karl's journal, this will also convince Regis at the same time. Note that if Karl is disgraced through Speech, you will be unable to use his journal as evidence to gain Regis' support.

When you speak to Papa Khan after convincing the other Great Khans, you can pass one of two 75 Speech checks to convince him to break the alliance with Caesar's Legion.

Alternatively you can return to Colonel Moore after speaking to Regis and tell her that the Great Khans will help her if Regis is in command; she will then ask you to assassinate Papa Khan. Once you have killed him, speak to Regis and he will tell you that he will break the alliance with Caesar's Legion and help the NCR. There is a downside to this option: You will instantly fail the Why Can't We Be Friends (assuming you haven't already completed it) quest and you will gain some infamy against the Great Khans (Unless you kill him without being detected). If you kill Papa Khan without being detected then talk to Regis, you will actually gain rep for the Great Khans.

Assassinating Papa Khan is probably the easiest solution to this mission, and can be done relatively easily, even with low sneak, assuming the player has a 75 lockpick skill (or you can wait around midnight and he`s going to walk straight from the table to his room, unlocking the door in the process). The rear door of the Longhouse leads directly to Papa Khan's bedroom, where he sleeps alone. Use a stealth boy (unless your sneak skill is high), pick the (hard) lock, and reverse-pickpocket a grenade onto the sleeping Papa.

If you do not want to kill Papa Khan after talking to the Colonel, return to the long house and mention the treaty. Papa's concern for the Great Khans' legacy leads to two speech checks (both 75) and a longer third option (which eventually leads to the same two choices). Choosing the first speech check ("claim your own glory") will have the Khans fleeing Red Rock Canyon during the Battle of Hoover Dam (yielding Great Khans fame). The second speech check ("ghosts and martyrs") will prompt them to perform a suicide attack on the Legion at the dam. The third choice regarding past inspiration sends you to the Followers -- Julie Farkas at the Old Mormon Fort will point you toward a Follower named Ezekiel, who is located at 188 Trading Post. Ask him about the Khans and he will give you a history book, Pretty Pretty Horsies: A History of the Mongol Empire. If you deliver this book to Papa Khan with the kinder top dialog choice, the Khans will flee the canyon during the battle (Great Khans fame); delivering the book with the meaner dialog choice leads to the Khans' suicide mission.

Whether you've used speech or the book, you may finish the quest by wishing him the best (or not caring). However, if you ask him to ally with NCR and tell him to stick around, the quest will remain open for you to solve via talking to Regis/Colonel Moore and assassinating Papa Khan.

Caesar's Legion

 * 1) Complete the quest We Are Legion and possess a high reputation with the Khans (may require idolized), Papa Khan will make you his heir for your role in the collapse of Camp Forlorn Hope and all of your deeds around Red Rock Canyon.
 * 2) Kill Papa Khan quietly, then inform Regis the Khans will support Caesar completely.

Note: ''Be sure to complete Why Can't We Be Friends? prior to killing Papa Khan and taking over, as there are no options for the Courier to accept the Powder Gangers into the fold. Evidenced by the quest failing upon Papa Khans death.''

Bugs

 * If the player convinces Papa Khan to break the Great Khan's allegiance to the Legion, random NPC chatter after completing the quest will still talk about how the Great Khans were "destroyed" and "massacred," even though a peaceful solution was found.


 * If Julie Farkas somehow ends up dead, the quest will be impossible to complete via the book, even if you head to Trading Post 188 and kill Ezekiel for the book. The only way around this is to convince Papa via the speech option.


 * Stealing Karl's Journal from his footlocker and then killing him will disable you from using it as evidence against the Legion for Regis, making the slave ledger in Caesar's tent the only usable proof you can use.


 * If you trigger the dialogue where Papa refuses to break the alliance with the Legion BEFORE this quest is started, the option will NOT come back, as it seems to be a one time dialogue option, and so the quest gets locked and is unable to be completed because you cant trigger Regis coming up to you and making a proposal after you leave the Long House. For PC using the console command  will bring back all of the dialogue options needed to trigger Regis although some of them may still be "grayed out" cycling through all of them normally will allow the encounter with Regis outside of the longhouse. For the Xbox 360, you can still get Regis to trigger his dialogue, but Papa Khans question will still never show up again. Amendment: If you go at night and/or when Regis is not sitting at the table and talk to Papa, Regis will not give you the dialogue necessary to start this quest.


 * If you use Speech checks to get Karl to reveal his true feelings about the Khans, resulting in his death, "For the Republic, Part 2" will update to inform you that you've killed the Khans even though none are dead. This will likewise happen if you convince Papa Khan not to side with the Legion while Karl is still in their good graces, as they will again kill him. To avoid this bug, steal Karl's journal (it's in the footlocker in the furthest room from the table) and show it to Papa Khan. Karl will die, but the quest will proceed as normal.


 * A marker is not placed at Caesar's tent to get evidence for Regis, nor does Karl's journal complete objective. Confirmed. Karl's Journal is not the proper evidence to complete this quest on PC, Xbox 360( so far works fine on some 360 consoles) and the ps3 (correct you are looking for the Legion slave ledger, which can be found inside Caesar's tent at the Fort). There is a marker for the journal, however no new dialog appears. No marker is present for Caesar's tent and it appears the quest cannot be finished (this is NOT true. Although the marker is missing, going to Caesar's tent and picking up the Legion slave ledger will update the quest as intended). However, on the 360, Karl's journal is inside the room next door to Papa Khan's, in a footlocker, and can easily be stolen.


 * If you don't get the speech option to assassinate Papa Khan from colonel Moore even if you have the Journal entry: "Talk to colonel Moore about a Great Khans/NCR alliance", just go into Papa Khan room's while he is sleeping around 1:00am and kill him (sniper rifle with noise suppressor mod is recommended) then find Regis and he will show you an speech option about the alliance, then go to Colonel Moore an let her now about it, this way you will get the great khans support in the final battle. This may end the quest as failed and will make Regis become hostile. (confirmed in PC)


 * After talking to Regis and obtaining the 'Oh my Papa' quest you may be attacked by some Great Khans who are hostile. Killing them fails the quest. This may be because Boone is your companion at the time as he does remark after killing them "Guess he fought at Bitter Springs". (Confirmation needed, possibly triggered by Oscar Velasco, if the quest Climb Ev'ry Mountain is completed with him leaving to Red Rock Canyon. Confirmed Boone WILL shoot him on sight if spotted in the wasteland.)


 * Talk to Colonel Moore about a Great Khans NCR alliance. When you head to the Hoover Dam Colonel Moore is in the Offices area the marker will tell you to go to her office but she is not there she doesn't spawn even if you sleep for a few hours or leave and do other quests for a little while


 * Offering to find proof of female enslavement for Diane will override Regis' quest target, so completing it will also meet his requirement. Convincing Jack through Speech afterward will get all three characters' support, making the trip to Cottonwood Cove unnecessary.

Behind the scenes

 * The title of the quest is a reference to Eddie Calvert's song of the same name. A well-known cover was made by Jim Nabors as Gomer Pyle.

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