On PC since last year, new to Xbox One and now cross-playable with Windows 10 via Play Anywhere
Bethesda's little Android promotional title from 2015, Fallout Shelter will be available on Xbox One and cross-playable on Windows 10 using Microsoft's new Play Anywhere service. The casual bunker game has grown quite a bit since its early promo days. New rooms, enemies, crafting, pets and a load of options and features has been added to the game since its release.
It is quite out of the ordinary that a tie-in game manages such a long and frequently updated life span, adding more features and spreading out to more and more platforms as it goes. Is it fun? Are there obnoxious timers? There is a story? Microtransactions? While the answer to all those is generally yes, you can easily for yourself tomorrow, on you platform of choice, unless that platform happens to be PlayStation 4.