Outpost Zimonja - Carried by a raider in power armor named Boomer.
Malden center - Found behind a train car hugging a wall.
Libertalia - Carried by a random raider at the top of the main building.
Lexington - On the walkway where the raider with the power armor is found.
Hub City Auto Wreckers - Carried by a named Gunner, Bridget.
Gunners plaza - In a locked utility closet in the southwest corner of the second floor.
Goodneighbor - Found behind the desk, beside KL-E-0 in the Kill or Be Killed store.
Federal ration stockpile - In the main stockpile area, just inside the room with two turrets against the wall near the terminal that operates the doors (the second one).
This is by the raider boss' bed and terminal. Technical High School - At the far end of the old swimming pool in the northwest corner of the lowest level of the school.
Cabot House - In the basement near Edward's bed.
There is a nearby deathclaw that will attack on sight. The Fat Man lies next to a dead soldier at the end of the cave.
Boston mayoral shelter - Beneath the basketball court is an entrance to a cave.
The Fat Man is located in a van on the water's edge behind the nose section of an airplane. From the Boston Airport fast travel location, head east.
Boston Airport - Slightly north of Boston Airport, there are wrecked cars.
BADTFL regional office - In the evidence locker.
ArcJet Systems - Found in the room marked '2' in the Engine core.
Nuka-nuke launcher, a unique version that deals 50% more damage than the standard model by firing quantum-enhanced Nuka-nukes.
The Striker, a unique version that fires modified bowling balls instead of mini nukes.
Big Boy, a unique version with the Two Shot legendary modification.
When fitted with the MIRV launcher, it fires six mini nukes in a cluster that separates in mid-air, drastically reducing its range, but increasing its overall damage and area of effect. Eventually, it was discovered that by placing a small sub-charge into the ammunition itself, similar to bullets being fired from a gun (or perhaps more accurately described as being along the lines of a recoilless launcher), the warheads could be launched a considerable distance without adding too much weight to the already heavy weapon. It also appears to be larger, with a rusted silver paint job.ĭevelopers struggled to find a way to fire the heavy ammunition from a man-portable system far enough to keep the operator outside the blast radius, losing a lot of people in the process. There is no longer a handle on the right side of the launcher, and instead two straight handles on the bottom. The variant appearing in Fallout 4 has a slightly different appearance than in previous games. Army, the Fat Man is a shoulder-mounted mini nuke launcher. First entering service in September 2077 with the U.S.