Fallout 4's 'When Pigs Fly' quest was added as part of the game's current-gen update, releasing in April 2024. While it's only a short sidequest, the rewards you earn from it are well worth it. Here's how to start and complete When Pigs Fly in Fallout 4.

You will automatically receive the 'When Pigs Fly' quest when you leave Vault 111 when starting a new game, or when you load an existing Fallout 4 save file. When I loaded my save after downloading the update, this quest appeared in my quest log, along with a few others that were also added as part of the current-gen update.

When you do, select the quest from your Quest Log and press Square on PlayStation or X on Xbox to bring up its location on the map. Your quest objective, “Investigate Saugus Ironworks,” will be highlighted just south of Wattz Consumer Electronics and east of Cambridge Police Station. I fast-traveled to Wattz Consumer Electronics and ventured south from there.

When you arrive at the quest marker in a garage in the middle of a built-up city, interact with the terminal and select the third file down called 'Weapons Dealer in Monsignor Plaza' to advance the quest. You can read the others to get a bit more background on the story, but if you're just mainlining the quest, click that third one and move on.