That Lucky Old Sun

 is a quest in Fallout: New Vegas. It is also an achievement on the Xbox 360 and PC; and a bronze trophy on the PlayStation 3.

Objectives and Walkthrough
When you first approach the Helios One station from the south, you will be approached by a female NCR officer by the name of Lt. Haggerty. With either a successful speech check, a science skill option, or good reputation with the NCR you can convince her to allow you inside, and that you should talk to the "idiot wearing sunglasses". If you can't muster any of these options you can simply sneak in through a back door which is locked (very easy) located behind the Lt. with only minor Karma loss and no NCR hostility or reputation loss (although you'll have to use this entrance every time). Proceed to the back of the factory, following the compass. You will soon come across a door with a light above it; this leads to the NCR's de-facto science lab at the power station. The "Idiot wearing sunglasses" is a man by the name of Fantastic, who explains that he got the job by lying to NCR when they were going door to door, asking if anybody knew a scientist. You will get the password to the other (western terminal) from him and the place you can direct the power to. Next you must speak to Ignacio Rivas in the next room. He will explain that the HELIOS One-station is not only a power plant, but also a developmental facility for a weapon known as "ARCHIMEDES", and that he has kept the NCR in the dark about the weapon, fearing what they may do with it. He will also give you the password for the eastern set of mirrors (only if you tell him you support PEACE; if you tell him you support war you will have to find the password elsewhere and you cannot prompt him again for the password), and explain that you must go to the control computers for the mirrors, attempt to reconnect with the mainframe, then go to the mainframe to redirect the mirrors, and direct the power. Also, if you don't tell him you support peace, you will not get any rewards from him for choosing the Followers of the Apocalypse oriented choices. If you told him you support the NCR, or used another option besides peace, you can pickpocket the password from him for a loss of karma. Proceed out the back door into the mirror field, and head for the control computers, which are each located in small shacks nestled among the mirrors. '''The shacks are guarded with traps and attack dogs. The traps can be dangerous, and possibly lethal to an unwary player. The dogs are hostile, but do not attack you right away. You have more than enough time to walk in, use the terminal and walk out before they will attack. ''' Killing the attack dogs sometimes renders the NCR troopers hostile. This can be avoided by accessing the terminal using a Stealth Boy. Another option is to open the shack door and then exit and re-enter the area. As the NCR guard dogs are hostile, they will attack NCR personnel and get killed. After you reset the mirror control computers, you must enter the tower through a door at the base. If you go straight (quickly) and make it the door (past the turrets) you can hack a terminal to turn off the Mark III turrets. You don't have to turn the turrets off completely: you can disable their targeting system, which will cause them to attack any robots in the vicinity. THEN you can turn them off. Watch the ground in this room for planted frag mines. (Note: disabling the turrets does not disable the Protectrons.) Or you can simply fight your way through Mark III Turrets and Protectrons till you get to the bottom of the basement, where a working elevator takes you to the mainframe. If you get initially overwhelmed by the turrets and securitrons there is a 2HP 0Rad drinking fountain across from the first room where you turned off the MarkIII turrets. NOTE: You need at least 35 Repair and 1 Scrap Metal to access the mainframe due to lack of sufficient power which requires you to use an auxiliary generator next to the mainframe. Scrap metal can be found on any of the Protectrons you just killed. Or if you go to the upper level of the same room, towards the back there is an offline Mr. Gutsy named Python, which you can interact with if you possess a Poseidon Energy employee I.D. or having at least 45 Science, the robot will then fix the generator for you. NOTE: To find the Poseidon Energy Employee I.D.:  After entering the tower eventually you will come to a long tunnel. After going down the long tunnel turn left, and left again. You will have to fight a sentry bot, Mr. Gutsy and Protectron to get through. Then there will be a set of metal stairs. Descend the stairs and enter the doorway. Take the hallway right, this will lead to offices on the left. Around the corner and to the right of the first one there is a half skeleton, right next to it is the Poseidon Energy employee I.D.. If you are backtracking from the generator room then simply go back through the metal door, through the room with the bunker and go to the left side of the left room. NOTE: The eastern terminal password can also be found on a desk on the second floor. Go right from the front desk, to a staircase to the second floor and take the holotape that is on a desk.

McCarran and Las Vegas Strip
Select the first option, "McCarran and Las Vegas Strip", exit the mainframe, take the stairs up and follow your compass to outside. Once outside, go down the spiral stairs and activate the Reflector Control Panel and enjoy the show. After your screen turns normal, go back to Fantastic and listen how he tells you he's going to take most of the credit. This will get you 350 XP and New California Republic reputation.

Fremont and Westside
Select the second option, "Fremont and Westside", as your grid configuration, go outside and activate the Reflector Control Panel to enjoy the show. When you have seen enough, return to Ignacio Rivas to be congratulated on your well made choice. He will tell that hopefully NCR's curiosity in the plant has been satisfied and they won't dig any deeper. You will gain 350 XP, 3 Stimpaks, 2 Doctor's Bags and a moderate amount of Followers of the Apocalypse reputation.

Full region
(See Bugs Below) Select the third option, "Full region", as your grid configuration, go outside and activate the Reflector Control Panel to enjoy the show. When you have seen enough, return to Ignacio Rivas to be congratulated on your very admirable choice. Stating that this will hopefully ease the NCR's curiosity about the plant. A Big Book of Science, 350 XP, 3 Stimpaks, 2 Doctor's Bags and a large reputation increase with the Followers of the Apocalypse. The Accepted Status will now be displayed, assuming no previous negative reputation has occurred.

Full region (Emergency output level)
Select the fifth option, "Full region (Emergency output level)" as your grid configuration, go outside and activate the Reflector Control Panel to enjoy the show. When you have seen enough, return to Ignacio Rivas who will be disappointed of all the energy wasted, but he will be relieved as the plant can not be used as a weapon anymore. You will gain 350 XP, 3 Stimpaks, 2 Doctor's Bags and Followers of the Apocalypse reputation. However, you will also lose some NCR reputation.

Archimedes II Weapon Path
Select the fourth option, "Archimedes II", as your grid configuration. A new menu item called "Arm ARCHIMEDES II Plant Defense System" will appear. Here you have 2 options. Both will grant 350 XP and you will be able to use Euclid's C-Finder as a laser designator for an orbital strike.
 * If you choose to arm the plant defense system, an alarm will sound warning personnel to get inside. Go outside and activate the Reflector Control Panel to enjoy the show. When you have seen enough, return to Ignacio Rivas. Ignacio will interact with you and Fantastic will thank you for killing his employers. You WILL lose reputation points with the NCR and you will receive NO rewards from Ignacio. though you do get the spoils of "war". After all nearby NCR troops are decimated by ARCHIMEDES, loot their bodies for many Service Rifles, Combat Knives, as well as NCR armor.
 * You will receive the rewards, Fame with the Followers of the Apocalypse, and not gain Infamy with the NCR if you run inside after obtaining the charge and before the lasers start killing NCR Troops. (on an un-patched game)
 * The above is not entirely correct; the Infamy will still be gained after leaving the observation tower. YOU CAN however quickly fast travel away once you leave the observation tower building, before the laser hits, and avoid the NCR infamy inflicted by arming Archimedes. Easier still, you can equip a disguise of a faction to negate the infamy, then after the soldiers are dead and the disguise unequipped, then fame should remain the same level it was before disguising. The quest is completed, although neither Rivas or Fantastic will speak again for any further reward.  Note: Any subsequent return to Helios One would cause the courtyard inhabitants to become hostile in accordance with the scripting of the Archimedes weapon having been fired.  A later return will not trigger infamy gain with the NCR.  However, you are able to use Euclid's C-Finder. DO NOT return to the reflector courtyard area after performing this glitch as this will trigger the Archimedes weapon to fire, and NCR infamy to be gained. There is no reason to return to Helios area following completion of the quest provided you have triggered the keywords for the "ED-E my love" quest through dialogue with Rivas. There is a Boomers quest later on requiring you to return and get parts for their array from the Helios Courtyard. Suggestion would be to use this path AFTER the quest. Alternatively you can collect the Solar Array parts before arming ARCHIMEDES. There are a total of 5 Array Parts and they have no weight in your inventory. So it's also possible to salvage them in advance (Repair 20 required) and keep them in your inventory until you get the quest.
 * This works post-first-patch on the Xbox 360.
 * Alternatively, you can choose not to arm the plant defense system and only receive 2 Stimpaks and a small amount of Followers fame from Ignacio.
 * If you chose to kill all NCR troopers outside of HELIOS, you can return at a later time to find that the Legion has taken over the plant. You will find two Legion troops out front, and inside you will find a dead Ignacio, as well as 'Fantastic' dressed in Legion garb.

Bugs

 * Selecting to activate ARCHIMEDES defence system, then de-activating it before walking outside will result in ARCHIMEDES activating and killing all surrounding NCR troops, your karma will take a hit and you won't be able to complete the mission. Ignacios will simply respond "What have you done? Get away from me". It's suggested that you save before using the terminal in the top floor (with the generator).
 * Full Region (Emergency output level) has a glitch. When you talk to Ignacio and tell him that "I overloaded the plant. No one will be able to use it to power a weapon.", the option will stay meaning that you can get infinite Experience Points, Stimpaks, Doctor's Bags.
 * A bug causes the quest to finish, but without getting any rewards (only XP). -Happened on PC with the option selected "full region". -Same happens for PS3 (10/23/2010) confirmed on Xbox 360, (10/24/2010) should be fixed with patch (1.1.0.253) but may not. You need to talk to Ignacio Rivas first and say that you are with the Followers of the Apocalypse. Then it will work and you get alot of reputation for the Followers.
 * Upon activating "full region", neither Fantastic or Ignacio will acknowledge the plant is working, even after quest completion. In addition, Ignacio cannot be asked about Archimedes, impeding progress of the ED-E side quest.
 * In some cases it is impossible to access the mainframe after putting the two terminals online.
 * There is a bug when Archimedes II is activated. Fantastic will yell at you for killing his paycheck, but the quest will not complete. Killing Fantastic seems to fix this bug.
 * There is a bug in the PC version where the player doesn't get the achievement upon completion of the quest. -happened with Archimedes II activated.
 * If you choose Python to repair the generator for you, you can kill Python, leaving electricity flying in the air to nothing and the generator will not be fixed. But by waiting at least 1 hour Python will resume with 1 health and resume work on the generator.
 * There is a bug that prevents the player from viewing the two terminal computers in the field (Possible fix: visiting the suite upgrade terminal at Lucky 38 casino after the problem appears seems to fix the bug)
 * There is a bug that doesn't allow you to hack computer terminals nor pick safes in the solar collection tower. Also could not use scope on 9mm handgun (just shows black screen when trying to use scope. same problem when hacking).Other time shows you the black computer screen when trying to lockpick.Same thing with scoping 9mm
 * Running across the corridor to the room with the console to disable the turrets when first entering below, the room has mines on the floor that go off. If you jump on the table to avoid them sometimes you get stuck, unable to move and a reload is needed.
 * If you are doing the NCR quest chain and go to Hoover Dam to talk to the Commander before you finish the quest, Fantastic will be there instead of HELIOS One, meaning it is impossible to finish if it tells you to talk to Fantastic. Sometimes, it actually seems to work to go to the Hoover Dam and simply kill Fantastic to complete the quest. The guards will not get hostile if this trick works. Unclear however, how this fix affects any further quests.
 * There is a bug concerning the back door of HELIOS One (when you leave the building to go to the Observation Tower) in that Ms Gibson from Gibson's Scrapyard, her dogs and mole rats 'appear' in the door but behave as though they're still in the Scrapyard. When exiting the door you will hear loud banging noises and if you wait, something from the scrapyard will appear out of the closed door.  If the dogs appear with the Mole Rats, the dogs will be hostile towards the Player and all Companions and will have to be killed. Also the NCR soldiers and dogs in the yard will sometimes become hostile towards the player when this bug occurs. It is possible to start from the last save and the bug may not appear.
 * Sometimes when you repair generator by youself and after that start the terminal you cant see interface of terminal at all. Talking to Ignacio Rivas seems to fix the bug.
 * After enabling Archimedes II Defense System and going outside to proceed with the activation, if you activate the sequence and go back inside directly after getting the Archimedes II charge you will not gain Infamy from NCR if you do not let the defense system kill any NCR and will get Fame from Followers of the Apocalypse.
 * If you use the 'tcl' console command to move from the top of the tower (where you activated the power grid) to the ground-floor door leading to Ignacio Rivas, he may be unresponsive to the choice you made unless you backtrack normally down the tower.
 * There is a bug where sometimes after returning to Ignacio to complete the quest, he will not be able to give you the option to finish the quest, and only talk to him as normal, despite the quest marker still telling you to speak to him.


 * POSSIBLE FIX:Returning to watch the power plant activate can sometimes solve it
 * - Test firing Archimedes laser caused game to freeze.

Video
thumb|300px|left|note: this video is part 1 of 3 thumb|302px|right|Infinite XP, Stimpaks, and Doctor Bags