The weapon in question is the BFG from the Doom franchise. These mods have added a number of new features to the game, with one such mod adding one of gaming's most iconic weapons to the world of Fallout 4. This has included hidden underwater treasures, Easter Eggs, and other secrets, but for PC gamers, Fallout 4's popularity has also been maintained thanks to a steady stream of mods from the community. Over a month since it released, Fallout 4 remains one of the most popular games in the industry, thanks to players continuously discovering new content. Modder LeGioN675 releases a mod for Fallout 4 that adds one of gaming's most iconic weapon, the BFG from the Doom franchise, to post-apocalyptic Boston.