Arizona Killer

Arizona Killer is a quest in Fallout: New Vegas. It is also an achievement/trophy for all platforms. The quest is given by Caesar or Lucius at The Fort, and requires the player to assassinate the President of the New California Republic.

Objective
Rendezvous with Cato Hostilius, then kill President Kimball.

Walkthrough
Cato is camping just west of Ranger Station Delta. He will suggest rigging the President's Vertibird to explode. If you have Explosives skill 50 or above, he will give you a bomb. If you do not have this skill then you will have to form your own plan. In either case, Cato will give you NCR armor to use as a disguise.
 * This disguise will fool NCR Troopers, but Rangers will still attack you on sight. In many cases, a Stealth Boy is more useful than the disguise. If you do use an NCR disguise, be sure to remove it before returning to The Fort when the quest is over!

Cato will then run to the visitor center at the Hoover Dam and join the crowd of spectators. The visitor center and stage are heavily guarded by NCR troopers and Rangers. (Bringing a companion here can lead to unwanted fights with NCR troops, which can cause the quest to fail. Unless you really need help, tell companions to wait elsewhere.)

Make any preparations you need, then approach Cato in the crowd and tell him you're ready. If you take a long time to reach the Dam, wait too long before telling Cato you're ready, or arrive and then leave before the President is dead, the quest will fail - so it's worth backing up your save before you start the quest. About ten in-game minutes after you tell Cato that you're ready, the President's Vertibird will land on top of the visitor center. The President and his guards will walk from the Visitor Center to the stage, where the President will deliver a speech. Then he and his guards will walk back to the Vertibird and leave.

There are many ways of killing President Kimball during this sequence - see assassination methods below. If the President escapes alive in his Vertibird, the quest will be failed. The quest is completed as soon as the President dies, but you also need to escape afterwards, which can be challenging because of the number of hostile NCR troops. (One simple way to escape is to dive into the lake, swim to land, then fast-travel.)


 * Even if you fail this quest, you can still continue Render Unto Caesar. You can intentionally fail the quest by never going to the Dam, or by leaving before the President arrives. You will miss out on Legion fame, the Meat of Champions perk for cannibals, XP for the President and his guards, and the Arizona Killer achievement.

Close range
Once the President is out in the open, it is relatively easy to kill him using normal weapons. However, escape can be difficult because of the large number of nearby NCR troops who will become hostile. Players of about level 20 or below will likely be killed by NCR Rangers within only a few seconds. Powerful weapons such as a Fat Man or Euclid's C-Finder may make it possible to defeat all the NCR troops, or destroy enough of them to allow escape. High-level players may simply be able to fight all the guards and win.

Sniping
There are several positions from which it is possible to kill the President at long range and then escape without having to fight most of the troops. Two notable places:
 * The top of the tower behind the stage. Reach the foot of the tower by following the road to the left of the stage and dodging the Rangers. There is a Ranger sniper on top of the tower. Kill him quietly, then shoot the President with a Sniper Rifle or other long-range weapon. Alternatively, use Euclid's C-Finder, which will also kill many NCR troops and yield a lot of experience.
 * The rocks near the base of the ridge, in front of the visitor center doors. The best moment is when the President is walking to the stage. If you kill him with a silenced weapon, it's even possible that no-one else will turn hostile. Even if you use a loud weapon, it is still possible to sneak away from the area, even with low Sneak skill, as only one Ranger is nearby.

Destroy the Vertibird
There are several ways to do this:
 * Plant Cato's bomb on the Vertibird while it's on the helipad. Cato will provide this bomb willingly if you have Explosives skill 50 or above; the bomb can also be pickpocketed from him. Reaching the helipad requires you to get past Jensen. You can kill him silently, sneak past him, persuade him with Speech skill 55 or above, or dress as an NCR Engineer - there is an engineer's uniform in the supply closet inside the visitor center. Once planted, the bomb will explode when the Vertibird takes off.
 * Program the anti-aircraft cannon to shoot down the Vertibird. This is done using the computer terminal at the top of the exterior staircase, just east of the visitor center door. Science skill 50 or more is required. This can be done before telling Cato that you're ready.
 * Sabotage the Vertibird's flightplan. This is done using the computer terminal inside the visitor center, while the Vertibird is on the helipad. This can be done before telling Cato that you're ready. When the Vertibird takes off again with the President on board, it will crash and he will die. All NCR troops will then turn hostile toward you - so it is a good idea to be hidden, or watching from some distance away.
 * Shoot down the Vertibird using your own weapons. The Vertibird has a high damage threshold, and will require multiple shots from a powerful weapon such as the Gauss Rifle or Tesla Cannon.
 * Shoot the Vertibird before it even flies in. Climb the first tower behind the stage, kill the NCR Ranger up there, and look west-northwest. The Vertibird should be just visible, parked on some ground in the ridge. From this vantage point it can be shot and destroyed before the visit even begins. (The fact that this is possibly may be a bug, but it does still resolve the quest.)
 * N.B. If the Vertibird is destroyed while President Kimball is not on board, the President will retreat into the visitor center and stay there with his guards. He will then have to be assassinated directly.

Plant a bomb
The first three methods here require at least one C-4 explosive charge and a detonator.
 * Put C-4 in Jeremy Watson's helmet. Jeremy Watson is an NCR trooper standing near the stage, missing his helmet. The helmet is on a table next to the stairs below the visitor center. Planting C-4 in the helmet requires Explosives skill 50 or more. Tell Jeremy Watson where the helmet is and he will go and get it and return to the stage. Wait for the President to be standing near him, then detonate the C-4.
 * Put C-4 somewhere along the President's route. The middle of the helipad may be the best place, which means getting past Jensen (see section above). When the Vertibird lands, wait until the President and his two bodyguards step out, then explode the C-4. This will not necessarily kill all NCR troopers on the roof.
 * Create a human bomb. Reverse-pickpocket several C-4 charges into Cato, Jeremy Watson, or any other NCR trooper who is close to the stage or the President's route. When the President walks near the bomb-carrier, detonate the C-4.
 * Rig the anti-aircraft cannon to explode. This is done using the computer terminal at the top of the exterior staircase, just east of the visitor centre doors. Repair skill 50 or more is required. This can be done before telling Cato that you're ready.

Bugs

 * If you go to the Fort, kill Caesar/Lucius and then return to the Dam, President Kimball will be dead and characters neutral to the NCR will treat you as if you killed him.
 * If you kill the President at close range, the system will most likely overload and freeze up because of all the activity of the crowd and troops. The best way to avoid this is to kill the President at a distance using a Sniper Rifle or similar long-ranged weapon, then retreat from the area.
 * Cato can spawn very close to the Cazador Nest, putting him in danger of death from the moment the quest begins. To avoid this, fast-travel to the area before taking the quest, clear out all the Cazadores, and then go to the Fort to receive the quest.
 * If you visit the Dam after recieving the quest but before making contact with Cato, the quest will automatically fail when you leave the Dam area. If you wait at the Dam without having met Cato, the President will never appear.
 * There is a Legion agent on the Visitor Center rooftop, dressed in an NCR Engineer uniform. He shows up as 'NCR Engineer', and is present before this quest. Despite not being necessary for the assassination, if he is killed before the quest is completed, the quest may fail. If he is already dead when the quest is recieved, the quest may fail immediately.

Kiler z Arizony Аризонский убийца