Fallout Shotguns

Fallout: A Post Nuclear Role Playing Game

 * Winchester City-Killer Combat Shotgun
 * Winchester Widowmaker Shotgun

Fallout 2

 * Sawed-Off Shotgun
 * Winchester Widowmaker Shotgun
 * Winchester City-Killer Combat Shotgun
 * H&K CAWS
 * Pancor Jackhammer

Fallout Tactics: Brotherhood of Steel

 * Beretta 470 Silverhawk
 * H&K CAWS
 * Ithaca Model 37
 * Pancor Jackhammer
 * NeoStead Combat SG

Fallout: Brotherhood of Steel

 * Combat Shotgun
 * Double-Barrel Shotgun

Fallout 3

 * Combat Shotgun
 * The Terrible Shotgun
 * Charon's Shotgun
 * Double-Barrel Shotgun
 * Sawed-Off Shotgun
 * The Kneecapper

Fallout: New Vegas

 * Caravan Shotgun
 * Sturdy Caravan Shotgun
 * Hunting Shotgun
 * Dinner Bell
 * Lever-Action Shotgun
 * Riot Shotgun
 * Sawed-Off Shotgun
 * Big Boomer
 * Single Shotgun

Fallout Shelter

 * Combat Shotgun
 * Sawed-Off Shotgun
 * Shotgun

Fallout 4

 * Combat Shotgun
 * Justice
 * Le Fusil Terribles
 * Double-Barrel Shotgun
 * Handmade Shotgun
 * Triple-Barrel Handmade Shotgun

Fallout 76

 * Combat Shotgun
 * Double-Barrel Shotgun
 * Salt of the Earth
 * Romington 76 Magnum
 * Civil Unrest