Render Unto Caesar

 is a quest in Fallout: New Vegas.

Quick Walkthrough
Notes:

Leave Boone or he will attack any Legion you encounter.

Do not enter Cottonwood Cove dressed as a member of the NCR or you will be attacked on sight.

Part I: Travel to Cottonwood Cove and take the barge to the Caesar's camp. Caesar will give you the Platinum Chip and tell you to destroy what you find in the vault. Either destroy the generators or upgrade Mr. House's security and return to Caesar. Kill or release Benny if you haven't already. Choosing to kill Benny allows you to take his special checkered suit: +5 speech and +5 barter skill, whereas releasing him turns all the Legion in the area to turn hostile towards you.

Detailed Walkthrough
This quest begins once you exit The Tops Casino after completing Ring-A-Ding-Ding. Vulpes Inculta will approach you and inform you that Caesar wishes to meet with you. He will give you the Mark of Caesar, which allows you to safely travel through Legion territory. This is essential if you have a poor reputation with Caesar's Legion. He will also mark Cottonwood Cove on your map. Note that if you killed Vulpes Inculta earlier in the game, Alerio will then present you with the mark.

Note: If Boone is in your party, he will inform you as you approach Cottonwood Cove that he will attack any Legion that you encounter. If you plan on attempting a diplomatic approach, now would be a good time to part ways with him--at least temporarily. He can always be found again in Novac (in Dinky the Dinosaur or in his house) or at Lucky 38.

Once you have arrived at Cottonwood Cove, talk to the man that is standing at the end of the dock. He will take you upstream to Caesar's camp.

Part 1: The Platinum Chip
Upon arriving at Caesar's camp, you eat cheese.

Part 2: Mr. House
Kill Mr House, done.

Part 3: Boomers
Caesar wants you to get the boomers to use their artillery cannons against the NCR when he attacks Hoover Dam. However, the problem lies in that the cannons blast anyone that gets close to their base (if you already are idolized with them then skip to the end). Head to their base and a guy will stop you and offer information on how to get past the shells. You can use a speech check or pay him, but all it boils down to taking a left turn as soon as you see the houses and following the house line until you reach the end. Make a beeline for the fence, and once you are close enough to the fence enter the gate. (Small suggestion: don't bring companions on Hardcore unless you don't like them, they tend to lag just enough that the near misses for you are direct hits for them). Talk to the Boomers and follow directions until you complete the quest-line and have support from the Boomers. After all this return to Caesar and let him know that the Boomers are on his side.

Part 4: White Glove Society
You must bring Caesar's`offer of alliance to the White Glove Society. After learning about the society you can either tell Caesar they do not want his alliance (which ends this part of the quest) or go to Mortimer after talking to Marjorie and help revert the society to cannibalism. Mortimer will give you a key to the kitchen where Ted Gunderson will be locked in a freezer. You have the option of killing him or freeing him and returning him to his father. If you kill him you must frame his father by putting blood samples around his penthouse. Also, if you release him and then kill him all of the members of the White Glove Society will be hostile towards you and you may end up killing Marjorie. If this is done, the only way to finish the quest will be to reload from an earlier checkpoint. Caesar will never allow you to tell him the Society is not worth their time. There will be two hired hands with caravan shotguns in the penthouse to try and stop you from planting the blood. Once you leave the room you will then get some securitrons to investigate the room and arrest Gunderson's father. Return to Mortimer two more times until you are informed the society is now cannibals and confirm your alliance by talking to Marjorie. If you choose to free Gunderson, your going to have to find a replacement for the cannibals to eat, return him and confirm that the society is cannibals by talking to Mortimer and then Marjorie. Now return to Caesar with the news.


 * You may encounter a problem with converting the White Glove Society to cannibalism if you have a good karma rating. Mortimer might tell you that you wouldn't have the stomach to help him. To get around this, you either need to have a high enough speech rating, or be a cannibal yourself, to convince him you can help.

Part 5: Brotherhood of Steel
Blow up the bunker.

Part 6: Caesar's Illness
Caesar will die.

Part 7: President Kimball Assassination
Shoot the dude in the head. Quest done.

Part 8: Legate's Camp
Report to Legate Lanius

Behind the Scenes
The name of this mission is a reference to a Bible story in which, when shown a coin, Jesus Christ says to "render unto Caesar what is Caesar's and render unto the Lord what is the Lord's."

Bugs

 * Caesar's Legion may still be hostile towards the player, even when carrying the Mark of Caesar.
 * The above mentioned bug doesn't happen if you go straight to Caesar after his spy approaches you. It only happened to me when I spoke to Mr. House first.
 * Boone cannot be with you, even in spirit. Check to see if Boone's Spotter perk is active.  If the perk is active, tested by aiming at a target, then Boone is considered to be present and the Legion will attack you.  You must part ways with him prior to taking this mission, though he will return to Lucky 38's penthouse if you are on good terms with Mr. House.
 * Sometimes Rex can disappear when entering the Legion fort making it impossible to complete the quest. It is recommended to send him home or to the Lucky 38 casino.
 * Some players may find that if you leave the Lucky 38 bunker to sleep or to collect ammo you will not be able to re-enter legitimately. The security guard states nobody can enter without Caesar's permission. As well as this Caesar also will not re-engage in dialogue with the player - therefore you do not gain permission (despite the fact you have already done so). The only known way to re-enter the bunker is to attack the guard at the door of the bunker. This will allow you to open the door - however doing this will turn the entire camp hostile towards you and they will all follow you into the room and Lucky 38 bunker. Unfortunately there is no going back from this. Once you become hostile to the Legion you will remain hostile. Currently there is no workaround for this bug.
 * Some players my never be able to advance in the questline if they killed the primary NPC's in The White Glove Society and/or the Omertas as you will be told to report back to Caesar but a dialogue option will not propagate. Other then reloading before those events, no workaround is known as of yet.
 * If you have made Hadrin the new Elder you may be unable to get his key card as well as McNamara.
 * There is a glitch where if you save inside Caesar's tent, including the autosave, you may not be able to load the save it will give an error message stating that the game runs on downloadable content that is no longer available and that the hard drive the file is saved to is no longer available.
 * During part one of the quest if the player chooses to fight Benny in the arena some of the players weapons may not be returned and will be lost forever.


 * If you happened to have lost a companion such as ED-E and the Vault 22 glitch did not retrieve him, you may be unable to complete this quest because before entering Caesar's tent, a guard will tell you that you must leave companions outside the tent. Because you have no way to fire him or make him wait, you cannot enter, ergo you cannot finish.