Fallout 4 is the fifth installment in the Fallout video game series. The games are characterized by their inventive take on post-apocalyptic science fiction. Developed by Bethesda Game Studios, they pit players against the hazards of a vast nuclear wasteland. The game world is defined by 1950's 'Space Age' aesthetics, generating a strong retro-futuristic feel that sets Fallout apart from other sci-fi games.