You Can Depend on Me

You Can Depend on Me is a side quest in Fallout: New Vegas.

Detailed walkthrough

 * Speak with Alice McLafferty at the Crimson Caravan Company to begin the quest.
 * Deliver the invoice to Dr. Hildern. He can be found in the Camp McCarran terminal building on the ground floor. The first time you talk to him, he may just initiate the quest There Stands the Grass. If you talk to him again, there will be a dialogue option to deliver the invoice.
 * Complete three more objectives in any order.
 * Buy out Cass's contract. Speak with her at Mojave Outpost, at the bar. You can complete this objective via a variety of skill checks and will be rewarded with 500 caps and NCR fame on quest completion regardless of which option you select. Completion of this part of the quest lets you recruit her as a companion. Can You Find it in Your Heart must be completed or Jackson must be "Removed" (silent kill). (Otherwise, killing her with a silenced weapon and undetected will complete this part of the quest, but you will not be paid for doing so.)
 * Barter check of 50 requires payment of 750 caps from your own pocket.
 * Barter check of 75 requires you to bring her 12 whiskey.
 * Both Speech checks (50 and 75) require no payment.
 * You need to convince Jamison to quit his job. He can be found at the Atomic Wrangler Casino at a slot machine by the bar. Upon quest completion you will be rewarded with caps and NCR fame.
 * If you have a high enough reputation with the NCR, you can also convince him to quit and receive 500 caps (no skill check needed).
 * You can convince him to quit his job, without any checks and earn 300 caps.
 * Passing a Barter check (50) here will increase this to 400 caps.
 * You can convince him to quit by using a Speech check (50) and earn 500 caps.
 * You can kill him if you have a silenced weapon so long as no one catches you and earn 150 caps.
 * Acquire the Gun Runner's secret manufacturing specifications. (This part of the quest can be refused with no negative side-effects.) Use of a Stealth Boy is highly recommended to get in and out without being noticed or taking casualties so that you can be rewarded the full 500 caps.
 * Pick the average lock at the gate. Make sure you are hidden, and not detected. Head to the front door then all the way to the back of the building. Grab the information off the computer terminal to the right of the room, and head back out again. Make sure you are still crouching or else the guards will see you and attack. (While crouched, if there are weapons on the workbenches, you can take them and the guards will not notice.)
 * There is a shift change sometime between 10pm and 11pm (while the gun smiths are conveniently asleep) during which the player can follow a guard through the locked gate. The guard will leave the door unattended briefly to patrol the compound. By moving quickly and quietly, the building can be entered, the data retrieved, and the compound exited before the guard returns to his post. At this point, the gunsmiths may still be awake. If this happens to you wait until around 6am and they will have gone to sleep.
 * There are claims that this does not always occur. It is incorrect, however, that using a Stealth Boy is the only way to complete the quest when picking the lock to the gate. The entrance is not guarded 24/7, and waiting for the guards to be absent for a moment in the early morning hours will let you pick the lock and enter the building unseen, using sneak mode only (high skill level required, but no Stealth Boy needed). At this time, you will find the interior completely deserted (if you have ED-E's Enhanced Sensors, you can see the absence of NPCs in the building confirmed on the compass), and you will not even have to sneak to the back room. Just make sure you do not waste any time (through the door, straight across the lobby into the back room, use the terminal to the right, and get out), as at 6:00 AM at the latest, the guards will be back at the front door and will catch sight of you if you leave the building after dawn.
 * Alternatively, you can shoot a guard through the gate and have them chase you to unlock the gate, and then stay away 3 days to cause them to be neutral to you again.
 * Killing everyone will not stop you from trading with the Vendortron. Be careful not to kill Isaac, as he is involved in an unmarked quest.
 * If you run in while the guard's back is turned, you can enter sneak mode and hide behind the desk in the lobby. Use the grenade launcher, and fire it at the left-hand corner of the lobby. The workers come out to investigate - you can run in, download the specs, and run back out. However, when speaking to Alice, she will tell you an intruder was detected, and you will not receive the full reward, even though you do not have to kill anyone this way.

Behind the scenes
"You Can Depend on Me" is a 1961 single by Brenda Lee, it was featured a year later on her album Brenda, That's All. "You Can Depend on Me" reached #6 on the Billboard Pop Singles chart in 1961.

Bugs

 * Sometimes Henry Jamison may have no dialogue options, just "bye" due to the fact you never received or the game deleted the quest item.
 * If you have completed "There Stands the Grass" quest, Doctor Hildern might glitch and not accept your parcel. In the case of the Xbox 360 and PS3 for which this bug also exists, there is no known way to correct the lack of an option to give Dr. Hildern the invoice on PS3 or Xbox 360. it is, however possible to continue the quest on PC by using the console command "setstage 000EDB37 15" which will mark the Dr. Hildern part of the quest complete.
 * When you complete this quest and hand in the holotape schematics taken from the Gun Runners, a lot of items/weapons/apparel will disappear from your inventory. This has happened on the PS3 version with the most current update. A way around this is to give all your items to a companion, however this can fail as well.
 * During the first leg of the quest, Doctor Hildern may never appear, though he does show up on the compass. There is no fix for the Xbox 360 leaving the quest impossible to complete.
 * When you walk out of the office after giving the package to Thomas Hildern there will be none of your HUD showing and you can hear a very deep breathing sound. Also, you will not be able to move or access your Pip-Boy.
 * This may be a design oversight, but when you download the gunrunners' plans to your Pip-Boy, and sneak out, regardless of whether or not you're wearing a Stealth Boy, you will be caught and attacked.
 * Unfortunately, when sneaking in the Gun Runners factory without killing any Gun Runners, Blake's inventory will not change.
 * Getting the plans in a non-violent way by simply sneaking in and out can sometimes cause the gun runners to become hostile, even after leaving the Gun Runners factory and the policed area. This can be fixed by simply waiting a couple of days. They should then return to their neutral stance. Alternatively, close the gate at night so they can't see you, save and reload while within range of the guards forcing their script to reset.
 * If you have killed Van Graffs as a part of the quest "Tend to Your Business" talking to Cass will start the quest "Heartache by the Number" from the part where Cass asks you to kill Alice McLafferty. Killing Cass is the only way to continue this quest.
 * Often when doing the You Can Depend on Me quest, after stealing the pre-War schematics, fast-traveling back to the Crimson Caravan will cause a freeze while loading.

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