Nuka-Nuke Launcher
The Nuka-Nuke Launcher fires a variant of Mini-Nukes that are powered by Nuka-Cola Quantum. This may sound like a simple gimmick, but they actually do roughly 30% more damage than a normal Mini-Nuke and explode an a bright blue mushroom. Technically this is a Fat-Man modification, but since there’s only one available in the game and you can’t craft anymore, we’re going to treat it like a bona fide Fallout 4: Nuka-World unique weapon.
To obtain this weapon, you’ll need to complete the Cappy in a Haystack questline which tasks players with locating 10 Hidden Cappys throughout Nuka-World. Once you do, head back to the woman who gave you the quest and enter the office of John-Caleb Bradberton, the inventor of Nuka-Cola. Head all the way upstairs to an office and check the soda machine in the corner of the room to find a hidden button that reveals a secret elevator. That elevator leads down to a secret vault.
Make your way through the vault to find the living head of Bradberton and a choice. You can choose to kill him by disabling the power which will open up a sealed vault, or you can let him live and Sierra, the woman who gave you the quest, will give you a Nuka-Cola jumpsuit. Either way the quest will end. You can get both rewards though. Accept Sierra’s proposition, get the suit, and turn off the power anyway. You’ll have to fight Sierra, but the sealed vault will open and you can collect the Nuka-Nuke Launcher as well as schematics for the ammunition inside.
