Bethesda Game Studios is working on a mobile Fallout game called Fallout Shelter, the company announced today during Bethesda Softworks' pre-E3 showcase.
The game makes you the overseer of your very own vault. You build out rooms from an anthill side view, à la XCOM. You'll control the residents of the vault, and can expand their number as well as the structure itself — by sending two of them into a room to procreate, of course.
Bethesda Game Studios' Todd Howard noted that Fallout Shelter will be free-to-play, but promised that it won't contain paywall timers or require an internet connection. Loot comes in the form of lunchboxes, and you can buy additional ones in the game.
Fallout Shelter will be available on iOS tonight; Howard made no mention of an Android version. You can check out video from the show above.
Update: Fallout Shelter is now live on the App Store. Pete Hines, vice president of PR and marketing at Bethesda Softworks, said on Twitter that the company "will have info later about [an] Android version."