Bethesda has released Fallout Shelter on PC as a free download, bringing the game that has been downloaded over 50 million times on mobile to bigger screens. Along with this release comes Update 1.6 for the game which adds a new quest system to the game. With this system players can now control Vault dwellers and explore the Wasteland. This includes going to other vaults that may have been abandoned, as well as the Super Duper Mart. Combat has also been refined so players can take control and direct attacks, playing mini games to get critical hits.
If you want to download the PC version you need the Bethesda launcher, and you can grab that file by following this link.