I Forgot to Remember to Forget

I Forgot to Remember to Forget is a side quest in Fallout: New Vegas.

Quick walkthrough
Gain Boone's trust, visit the place of the Bitter Springs massacre, defeat the Legion attackers, then talk to Boone about how to accept his past.

Activating the quest
In order to access the necessary dialogue options, the player must have spoken to Manny Vargas in Novac or Bitter-Root in Camp McCarran about his tour of duty in the NCR and Bitter Springs. In order to trigger the quest, the player must accumulate 5 "history" points with Boone. These can only be earned while Boone is in your party.
 * Killing Vulpes Inculta: +1
 * Vulpes appears at multiple points, leaving several opportunities to kill him. He first appears in Nipton. If spared, he'll appear on The Strip to give you the Mark of Caesar (If you kill Vulpes when he approaches you at the strip, Securitron guards will not become hostile, nor will anyone else, making this the easiest time to kill him). Finally, he'll appear at the Fort by Caesar's side.
 * Camp McCarran
 * When interrogating the captured Legion POW Silus at Camp McCarran, if he dies: +1.
 * Note that this history point is earned for Silus's death at any point, not just during torture. The ideal way of earning it is by making the Speech checks to have Silus discuss the information leaks, talking to Boyd to get the rewards, then re-entering the interrogation room with a weapon and killing Silus with a sneak attack.
 * During the mission 'I Put a Spell on You' at Camp McCarran
 * If you confront and kill the spy in act: +1.
 * If you disarm the monorail bomb: +1.
 * The Fort
 * Killing Caesar at The Fort: +2.
 * Legion Raid Camp
 * During the side quest Booted at Legion Raid Camp, rescuing the hostage Powder Gangers: +2
 * Nelson
 * During the side quest Back in Your Own Backyard in Nelson
 * If you kill the hostages: +1.
 * If you save them: +2.
 * Camp Searchlight / Cottonwood Cove
 * Eradicate the Legion: +2. This can be done independent of the side quest Eye for an Eye (begun at Camp Searchlight; executed at Cottonwood Cove). Note: Counts after killing Aurelius of Phoenix.

Detailed walkthrough
In order for Boone to initiate dialogue about Bitter Springs, the player must have both gained Boone's loyalty and talked to either Manny Vargas in Novac or Bitter-Root at Camp McCarran (after a speech check of 30) about the Bitter Springs massacre. When this happens, the player can suggest going to Bitter Springs. Boone will initially refuse, but later request that the player travel there.

Once you get to Bitter Springs, he asks you to go to Coyote Tail Ridge, where he was stationed, and tells you exactly what happened during the massacre there. He then asks you if you don't mind staying overnight. If you say yes, the screen will fade out and fade back in, with Boone telling you that a Legion raiding party is on the way. It largely consists of recruits, but they can be tough to defeat, especially if you're trying to avoid casualties. Some tougher units will be mingled with the later waves.

The attacking Legion forces come in three waves. The first two waves come toward Bitter Springs up the sloping hill. The third wave comes through a small gap in the side (where the graveyard is located). Two waves of dogs will be dispatched prior to the second and third waves. The quest is considered complete once all three waves are dead. Boone will talk to you again, and at the end of the conversation his armor is upgraded depending on your last answer. Although both armors are only cosmetically different, this choice actually influences Boone's ending.
 * 1st answer yields 1st Recon survival armor, making Boone repentant.
 * 2nd answer yields 1st Recon assault armor, making Boone bloodthirsty.

Bugs

 * To determine your current 'history points' with Boone, you may type into the console
 * If you are unable to initiate the quest because you did the majority of the history point items without Boone as a companion, then while indoors type this into the console and exit outdoors, Boone will then initiate the quest.
 * Apparently, if you have killed all the NCR in Bitter Springs, this quest will fail immediately after the fade on top of Coyote Tail Ridge.
 * Despite the Legion being stated as Prime Legionaries they wear Recruit Helmets instead of Prime Helmets.
 * After beginning this quest and traveling to Bitter Springs, Boone will sometimes not initiate the conversation necessary to continue the quest and will have only his default dialogue when spoken to.
 * To be able to continue the quest, open the console and enter the command This will skip the part of the quest that's glitched, and allow you to begin the "Go with Boone to Coyote Tail Ridge" section of the quest.
 * The game will crash if you kill Vulpes Inculta before completing Boone's "I Forgot To Remember To Forget" quest in which Vulpes is set to spawn. The game still crashes even with Vulpes alive. Using the console, type to skip the stay at Coyote Tail Ridge.
 * With the 1.4.0.525 patch, disarming the monorail bomb no longer gives a history point if you kill Curtis, regardless of which method is used to disarm it or if it was disarmed before killing Curtis. The point will only be granted upon completion of the quest if Curtis isn't dead, at which point killing Curtis is no longer an option.
 * Dialogue with Boone will not start when you reach Coyote Tail Ridge making the quest incompletable (this can be fixed by reloading an earlier game).
 * Sometimes, if Boone approaches you saying that he's ready to go to Bitter Springs, but you don't immediately accept, he may become stationary and will not move again until you talk to him and tell him that you want to go to Bitter Springs.
 * If you have played the entire game with another companion and cannot earn any additional history points, on the player, go to the console and typing to start this quest.
 * If Boone is still looking for enemies even after you have defeated all of the Legion, Boone might say "Let's get through this first," when he was supposed to say the scripted line.
 * Both points you get during I Put A Spell On You may not count; whichever you do first (save the monorail or kill the spy) will count as one history point, but upon completing the other task the other history point will not register.
 * After completing this quest, members of the Great Khans may randomly appear near your character when waiting or sleeping. The wait or sleep period will end prematurely and the screen will zoom in as if initiating dialogue (even if no one is in front of your character), but will quickly zoom back out. If you look around, there will be a Great Khan (with whom you cannot speak) standing near your character doing nothing. This may occur numerous times.
 * The players game will grind to a halt and lock up during the 3rd waves attack. The players variations on approach to engagement, weaponry, tactics, prior saves, rebooting, are all ineffective. If the player disconnects from the network (offline), the scenario will slow but not lock up. One suggested method includes leaving Boone in the Graveyard (wait here) and covering the main entrance to BS as far away from the town as possible. Crawling will occur, but using fast travel in between waves around the local area also helps.
 * If you ambush Caesar at The Fort and kill Vulpes Inculta he will disappear after the kill shot preventing the player from looting the body.

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