https://www.gamespot.com/articles/e3-2018-fallout-shelter-comes-to-nintendo-switch-a/1100-6459652/

During its E3 2018 press conference, Bethesda's Todd Howard announced that Fallout Shelter will be coming to Nintendo Switch and PS4. The game, which was originally released on mobile during E3 in 2015, will be out tonight on the new platforms. And as with the versions on other platforms, it will be available for free.

According to Howard, Fallout Shelter has been played by over 120 million people, saying that's "more people than every game we have made combined." Previously, Fallout Shelter was available on iOS and Android, Xbox One, and PC. The game allows you to establish and lay out your own Vault. You're charged with managing its inhabitants to grow and expand the Vault while also sending out adventurers into the wasteland to gather supplies (although you don't actually directly control them).