Bethesda has silently released Fallout Shelter on PC. If you wish to play the hit mobile title, you'll need to install the Bethesda.net launcher to do so. To gain access to the game, you'll need to login with (or create) a Bethesda account and you should now be good to go. The listing was spotted by a user over on NeoGAF.
If you've already played the game on your phone, you'll immediately feel right at home on the larger display. It's an interesting move by Bethesda to release the game on its own launcher when consumers already have to deal with numerous programs already to launch their favorite titles.