In "Fallout," gamers navigate their way through a dangerous wasteland decades after a nuclear war between the U.S. and China. “Fallout 4,” which launches Tuesday, takes place in Boston.

In the Fallout universe, life before the bombs fell was simple. The world was stuck in a 1950s aesthetic, and despite the war, people seemed to live carefree. Dandy Boy Apples and Fancy Lad Snack ...