The Nuka-Cola Challenge

 is a Fallout 3 quest connected with the Nuka-Cola soft drink. It is also an Xbox 360 and PC achievement.

To start this quest, find Sierra Petrovita at Girdershade. Girdershade is located west of Jocko's Pop and Gas Stop or SW of Smith Casey's Garage [You will go to the garage during a Main Quest].

Upon finding Sierra Petrovita, she offers you to take the Nuka-Cola tour, of which she has a large amount of Nuka-Cola collectibles. After saying that you will take the tour, she shows you around her small 1 room home, and talks about various Nuka-Cola facts, and tells you about some of the items in the room. After the tour she gives you an "Ice Cold" Nuka-Cola.

She then asks you to collect Nuka-Cola Quantums and says she will pay you for them (40 caps each). Once you give her enough to fill her Nuka-Cola Vending Machine, she says she'll give you the Schematic for the "Nuka-Grenade". It takes 30 Nuka-Colas to fill the Vending Machine.

Exiting her house, you are confronted by her neighbor, Ronald. He will pay you the same price for those Quantums, double if your Speech skill is high enough to persuade him. He thinks giving her the bottles will let him do the "horizontal bump" with her. You also have the option if you have the Black Widow perk to do a threesome in exchange for him finding the bottles. There are three Nuka-Cola trucks scattered through the map. There is one near Paradise Falls, one near the Super-Duper Mart and another near Oldny, and in Eulogy Jones' home there is a few in an area behind his starcase but there is not 30, so some you'll have to find on your own. There are also 6 in the Super-Duper Marts back supply room with the protectron

Truck/Single bottle locations

 * One truck is east-southeast of Old Oldny. A red rocket is your landmark.
 * In Paradise falls there are a few under the stairs Eugloy's pad
 * Super Duper Mart? I think there might be on in a vending mechine outside the Super Duper Mart

Single bottles can be found in many locations involved in other quests.
 * On top of the cage just inside the main entrance of Springvale School (you'll have to go around and up stairs to get on top of the cage. Or you could jump and time it just right to be able to grab it from the ground.)
 * In the AntAgonist's lair (just north of Canterbury Commons)
 * Inside Jocko's Pop & Gas Stop
 * There are two in Dukov's Place: One in his bedroom and one in the Nuka-Cola Machine on the otherside of the room.
 * There is one in The Republic of Dave: In the Capitol Building - on the safe on the right side of Dave.
 * There is one in Old Oldny's sewers: In the sleeping champers on the left side.
 * Three bottles can be found in the Nuka-Cola Factory, but only after using a terminal inside.
 * North West of the Super Duper Mart, along the river, you'll find a destroyed bridge. Go across the bridge until it ends and jump into the water. Swim just a bit further to the next section and look around, you should spot many Nuka-Cola bottles floating around the surface, among them, a Nuka-Cola Quantum.

Bugs

 * Sometimes, Sierra Petrovita will run around her home in "fleeing" mode for a random period of time. In some cases, it will be absolutely impossible to talk to her. Reloading a save will not always fix this. It appears to happen randomly, but known causes include: That the player has killed an NPC that she likes (Ronald) or if a hostile has followed you into her house. Bringing Fawkes into the house also seems to trigger this.


 * The quest never updates after you get the manifest from the Nuka-Cola bottling factory. The quest counts the computer terminal that is located in the same room as Milo the Shipping Forman, as the manifest. Just use the Terminal, Its not locked.


 * There isn't any Nuka-Cola trucks on the PS3 version of this game. Those might also be very easy to blow up, or as noted above, the quest simply doesn't update and the trucks are never placed in the game. (The Old Olney truck does exist on the PS3 version. If you take the "road" east out of town (it's covered by a fallen highway overpass) and make a right at the billboard, you should see a truck. Haven't confirmed if there are others yet.)


 * If the Black Widow dialogue option is used Ronald often ends up dying once he reaches the Nuka-Cola Factory.