|For the item, see holy water (item).|
|Side Quest: Holy Water|
|Investigate the vicinity of Megaton.|
|Watch Rosa give Micky a bottle of seemingly pure water and die. Rosa then approaches you, and after a short conversation she reveals that she received the water from a cult in Springvale.|
|Ask about holy water in the Holy Light Monastery; talk with Brother Gerard.|
|Gain entrance to the Monastery by:|
|Becoming irradiated. (Equipping the ghoul mask will fulfill this option)||Passing a Speech check.||Picking the lock.||Simply killing Gerard and loot the key from his corpse.||Pickpocket the key from Gerard.|
|Stop the Apostles of the Holy Light.|
|Talk them out of stealing water with a Speech challenge or Charisma check.||Murder them all.||Irradiate yourself to above 800 rads.|
|Reward: 100 XP and 300 caps.|
This quest will not be offered if Megaton was destroyed during The Power of the Atom. The Lone Wanderer picks up this quest from Scribe Bigsley after asking him what they can do to help. He asks them to investigate the area around Megaton to see why they need more water, after just being sent a week's shipment of Aqua Pura.
Investigate the vicinity of Megaton
In front of the entrance to Megaton, the player character witnesses a 'cutscene' of sorts. A non-player character named Rosa gives Micky a bottle of seemingly pure water. He drinks the water and dies. Rosa then approaches the Lone Wanderer, and after a short conversation she reveals that she received the water from a cult in Springvale.
Alternatively, the player character can also receive various hints within Megaton, such as a note pinned to the door of the player character's Megaton House or a non-player character coming up to the player character and complaining about a cult stealing Megaton's water. Any Megaton settler will give the player character a holy water pamphlet if they interact with them. If the player character has very good Karma, then upon entering Megaton, a resident will run up and give them the pamphlet and complain about the cult.
Ask about holy water in the Holy Light Monastery
After finding the Holy Light Monastery, the Lone Wanderer encounters Brother Gerard. After giving them some holy water, he refuses to speak to the player character further until they drink it. Once the player character has done that, he reveals that the leader of the church, Mother Curie III, has been "blessing" water so that wastelanders may "bask in Atom's Glow."
Gain entrance to the Monastery
There are five options on gaining access to the monastery. One can ask Gerard if they may meet Mother Curie III but they must either be irradiated (equipping the ghoul mask can fulfill this option), pass a Speech check, pick the lock, kill Gerard and loot the key from his corpse or steal it from him via pickpocketing.
After gaining entrance, the player character enters the basement of the church by means of a trap door. Mother Curie is giving a sermon to two ghouls as the player character enters. Once she finishes the sermon, she engages the player character in conversation. She tells them that she has been intercepting the Aqua Pura from the Brotherhood caravans (whom she sees as "angels") and turning it into holy water by irradiating it. She does this because she wants to share Atom's gift with the people of the Capital Wasteland. This "gift" is ghoulification.
Stop the Apostles of the Holy Light
From here, there are four options. The player character can convince Curie III to stop via a Speech challenge, a Charisma check or by convincing her that they are the Prophet of Atom (with a radiation level above 800 rads). The Lone Wanderer can irradiate themself using the radiation traps (turned on with nearby switches), both in the basement and close to the entrance in Springvale. The fourth option is to kill everyone. But know that there is a feral ghoul reaver named Atom's Champion and a glowing one named Sun of Atom, both of which will turn hostile. Killing them does not take away Karma.
The Power of The Atom
Should the Lone Wanderer destroy Megaton after undertaking the quest, Mother Curie III can be found outside of Megaton as a hostile feral ghoul reaver. Brother Gerard can also be found as a regular friendly ghoul, who will say that he has seen Atom and that he is going to stay at Megaton to wait for Atom's guidance. Scribe Bigsley will express shock at Megaton's destruction but will still give the player character the money for completing the quest.
- If the Citadel is blown up during Who Dares Wins before accepting this quest, it will not be available at all.
- Disarming the radiation traps will render them inoperable. Therefore, it will no longer be possible to irradiate the Lone Wanderer by activating the podium switch.
- The lock on the trapdoor can be picked without Gerard caring. Doing so will not turn the inhabitants of the church hostile.
- Killing Gerard won't turn the inhabitants of the church hostile.
- Shortly after completing the quest and as long as Megaton hasn't been blown up, three Megaton settlers may be encountered arguing with two Brotherhood caravan guards over a shipment of aqua pura. Unless the Lone Wanderer intervenes on behalf of either side with a successful Speech check, the confrontation will turn violent and likely result in the deaths of the settlers, Deputy Weld (or Deputy Steel) and Stockholm. Persuading the Brotherhood to give up the shipment (apparently intended for Big Town) is easier than convincing the settlers to abandon their suicidal attack.
- If Megaton has not been blown up but is planned to, the Lone Wanderer can tell Brother Gerard what they are planning and he will pray for their success.
- The option to use the Speech skill to gain entrance to the monastery may not be available. [verified]
- holy water pamphlets found on doors in Megaton will respawn every time the cell loads, even after the quest is completed. On the PC, this can be remedied once the quest is finished by use of the console. Enter prid 006EB7 and enter, followed by disable and enter. This will permanently disable all of the interior Megaton pamphlets and prevent them from respawning. For the pamphlet on the door of Megaton, use prid 006EB3. [verified] The
- monastery glitch happens once you go inside the monastery and if you have autosave on, it will autosave then if you reload to that saved data, it'll create a glitch where you cannot look around (using right stick on XBOX and PS3) and you'll just be able to walk (Using left stick) which will make the mission hard to complete. The glitch will still happen rendering it being hard to complete and will force you to reload from an old saved data. [verified] The