Fallout Shelter is a free-to-play mobile simulation video game developed by Bethesda Game Studios, with assistance by Behaviour Interactive, and published by Bethesda Softworks. Part of the Fallout series, it was released worldwide for iOS devices on June 14, 2015, and for Android devices on August 13, 2015. The game tasks the player with building and managing their own Vault, a fallout shelter.
Upon release, Fallout Shelter received mostly positive reviews. Critics enjoyed the game's extension of the Fallout universe, the core gameplay, and its visual style. Common criticisms included the game's lack of depth, its use of unnecessary microtransactions, and its lack of an ending. To date, the game has grossed more than $5.1 million in microtransaction sales.