In the vast, mod-friendly universe of Fallout 4 , players have transformed the radioactive ruins of Boston into just about every other fictional universe imaginable. From Star Wars blasters to Witcher swords, the modding community has left no stone unturned. However, one of the most consistently popular crossover additions is the 2B mod —a series of mods designed to import the iconic android from PlatinumGames’ masterpiece, NieR: Automata , into the Commonwealth.