Fallout 4's “When Pigs Fly” quest was added as part of the “current gen” update for the game, which was released in April 2024. Although only a short side quest, the rewards you get from it are definitely worth your time . Here's how to start and complete When Pigs Fly in Fallout 4.
Unlock “When Pigs Fly” Side Quest
You will get the quest 'When Pigs Fly' automatically after you exit Vault 111 if you start a new game, or as soon as you load an existing save file for Fallout 4. As soon as I loaded my save after downloading the update, this quest appeared in my search log along with a few others also added as part of the current gen update.
Fallout 4 'When Pigs Fly' Quest Prosecutor
When you do, select the quest from your Quest Log and then press Square on PlayStation or X on Xbox to show the location on the map. Your search destination to “Investigate Saugus Ironworks” will be marked just south of Wattz Consumer Electronics and east of the Cambridge Police Department. I took a quick trip to Wattz Consumer Electronics and just ventured south from there.
When you get to the quest marker in a garage in the middle of a built city, interact with the terminal and select the third file down called 'Arms Dealer in Monsignor Square' to advance the quest. You can read the others to get more background into the story, but if you're just running the quest, hit that third one and move on.
You can venture straight east through Cambridge Crater like I did, but be prepared for the demons waiting here. There is also a small amount of radiation in the crater, so you'll want to use Rad Away after you're done.
Follow the search sign to the location and be prepared for battles with Raiders and some machine gun turrets dotted outside and inside. Go upstairs to the office, killing the two gangster-looking enemies inside. Grab the Rapid Pipe Grenade Launcher Rifle from the table (who doesn't want a fancy new weapon for free?) and read the shop note to advance the quest again.
Now you have to make your way to find Marvin who is conveniently around the corner from where we started this quest at the terminal. That means we go back west and follow the quest marker again.
Once you reach the marker, climb to the top of the building using the fire escape on the side of the building, killing the nearby raiders as you go. Just before you reach the roof, watch out, Marvin will be in one of the windows with a Vault Congratulations, and can wipe you out in one shot if you're not careful. I attacked him quickly and used the wall for cover, but he still removed most of my health.
After killing Barrett, take the Fat Man from his body as well as the schematics. Return to Suggs just across the road and you can return the pipe launcher schematics to him.
For your hard work, you will be rewarded with the Penetrating Chinese Grenade Launcher Rifle and 280 XP.
That's all you need to know about how to complete When Pigs Fly in Fallout 4. If you're into some Fallout on Steam Deck, we've got you covered with a Fallout 4 Steam Deck compatibility guide. Alternatively, if you're starting over from Vault 111, we've got building guides for Lucy MacLean, Cooper Howard and Maximus from Amazon Prime's critically acclaimed Fallout series.
