How to download and play Fallout Shelter on PC

After millions of downloads on iOS and Android devices, Fallout Shelter is now available to play on PC.
Crafty NeoGAF users discovered that the game went live yesterday, but is currently only available through Bethesda’s official launcher.
Bethesda referenced its personal client in a tweet yesterday, hinting that something was awaiting fans who went to investigate.
https://twitter.com/statuses/753318190105624576
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Fallout Shelter is due to receive a significant update for iOS and Android later this month, so it’s safe to assume the same features will appear in the PC version.
Since its launch following E3 in 2015, Fallout Shelter has received over 50 million downloads across all available platforms.
Considering this is Bethesda’s mobile debut it’s a seriously impressive achievement.
If you fancy checking out the game on PC you can download the Bethesda Launcher here.