Put the Beast Down

Put the Beast Down is a quest in the Fallout: New Vegas add-on Dead Money.

Detailed walkthrough
Before the Courier attempts this quest they must turn on the power to the hotel. Head straight ahead to the casino from the lobby. Once inside the casino there will be a security terminal in an alcove on the right and a security hologram standing to the front guarding the stairs to the bar. Use the security terminal to change its patrol route to Casino west, then head up the stairs to the bar. Once up the stairs and facing the bar, in the back left (southeast) corner, on the floor next to a couch is a Programmer's Digest. There is a speaker behind the counter above a refrigerator, so shoot it. Pick up the Casino security passcode from the bar counter next to three Sierra Madre chips. There is a first aid box beneath the speaker, and a vending machine code for wine on a shelf near the refrigerator. Enter the door next to the refrigerator.

Go straight ahead and up the stairs and find a door to the kitchens, but it is locked. At the end of the corridor is an open door. As it is approached, the familiar beeping will be heard. The radio is located in the room next to this one, on top of a tool cabinet on the left side of the room. This room also contains an Auto-Doc. The first room with the open door contains a terminal which has information for the History's Sake challenge, and a vending machine code for scotch. On the wall next to the door is a Very Easy security terminal, which can be used to change the behavior of the security hologram in the first corridor. If it is set to guard the bar entrance, it will have its back exposed, and the player character can access all of the corridor.

Head down the corridor and into the room on the right. Here there is a door to the cashier's office, and a terminal that opens the electrical closet and can reprogram the second casino security hologram to guard the cashier window. The hologram emitter for the upstairs corridor hologram is in the corridor beyond this room, up on the wall opposite the door; destroy this emitter to disable the hologram.

Head back to the bar area, walk around the bar back to the seating area near the stairs going down to the main floor, and look over the edge to the left. The hologram emitter for the casino security guard patrolling by the stairs is on top of a beam jutting out from the bar. Jump on to the beam and disable the emitter. To find the hologram emitter for the third and final casino security guard, continue to the end of the beam where the first emitter was found. Turn right, and you'll see the emitter on the main floor on the ground just around the corner of the doorway (on right side). The electrical closet is at the end of a short corridor behind this emitter, which should be disabled to eliminate the nearby final casino security guard. In the electrical closet, flick the switch on the right hand wall to give power back to the casino.

At this point, the player character will receive the quests Last Luxuries and Curtain Call at the Tampico. The Courier can do the three quests in any order, but as Elijah will say at this point, all of the Dead Money companions must be dealt with before moving on to the final quest.

Exit the closet. The security holograms will now be deactivated (even if one or more of the three hologram emitters in the casino had not been destroyed earlier), and the casino will be full of hologram dealers. You can now gamble here if you wish, and there is now a cashier who will exchange pre-War money for Sierra Madre chips and vice versa.

Go back to the lobby, and enter the Cantina Madrid. Disable the speaker on the top left wall. The marker points to an emergency maintenance key sitting on a clipboard to the right as you enter, so pick it up. You can hear Dog and God arguing with each other, but you can't reach them from here. Head back into the lobby, and from there to the casino.

Head upstairs to the bar again, through the door behind the counter, and up the stairs. Use the key to open the door to the Cantina Madrid kitchen. There are three gas valves you must shut off before you can leave this area. If you are spotted by Dog, he will set off his collar to ignite the gas, killing you both, unless you initiate conversation with him.

If you pass a Speech check of 50, you can tell Dog to remove his collar. This will kill him, and you will need to get out before yours goes off as well, so you need to turn off the valves first if you plan to use this option. Depending on which personality you have gotten favor with (indicated by dialogue), passing a Speech check of 75 will enable the personality that favors you to "kill" the other personality and take over. Passing a third Speech check of 85 allows you to merge both of them together, for good Karma. Alternatively, you can simply kill him in combat.

If Dog dies either by battle or by jerking his chain, make sure you loot his body. He has the Maintenance Pass that will allow you to open the sealed doors.

Any option completes the quest, but you still need to turn off all three valves before you can leave. As you enter, the first gas valve is on the right hand wall pretty much straight in front of you. Head into the door on your left, then through another door on the left near the ovens, and the second valve is on the right hand wall. The third is at the back of the previous room, between two doors. The second and third valves are along Dog's walking route, so make sure you aren't seen. The second option is to talk to Dog. If you get the chance, sneak up on him and stand up to talk.

Note: There is a dramatic change to Dog and God’s ending if you merge them together. They will not remember you, but will mention having a sense of gratitude toward you. The merged personality will not attack you.

Bugs

 * Due to some as of yet unknown reasons, the emergency door to Cantina Madrid that is supposed to lead you to the kitchen takes you back to the room where the emergency door key was in, giving no way to enter the kitchen and complete the quest. This can be solved by starting and completing some other quest about dealing with the team members instead, then returning to the casino to enter the kitchen of Cantina Madrid.
 * Waiting in this area may cause Dog to die and set off his collar as well as yours. The collars go off almost instantly when re-loading an autosaved game. It is advised not to wait in this area.
 * There is a possibility that the Speech options to keep God in power at the end of this quest will not exist. This happens despite keeping him in control throughout the add-on.