"Fallout Shelter" is becoming a sensation, which is why Bethesda isn't wasting any time in improving the mobile simulation game. Apart from much-needed changes, its first update introduces the new Photo Mode feature, which allows players to take a screenshot of their vault. 

To capture that special "Fallout Shelter" moment with those adorable vault dwellers, gamers simply need to tap the button at the bottom left corner of the screen. They can save the photo on the device or share it with their friends via their social media accounts. 

The update also fixes a bug that badger pregnant dwellers.

"Vault air filters have been causing some mothers to not deliver babies and we understand this is causing long term discomfort," Bethesda said. 

With the update, all that's taken care of. The game studio quipped that they can't do much about the actual "discomfort [with] the baby coming out part." Nevertheless, it's good to know that pregnant dwellers will actually give birth this time. 

And lastly, the update should eliminate minor issues and bugs, which makes the game more stable now. Here is what Bethesda promises with the first ever update for "Fallout Shelter":

• Overseers are encouraged to record any bizarre dweller behavior with the new Photo Feature. Sharing with those outside your Vault is optional, and will not result in your replacement or termination.
• Vault air filters have been causing some mothers to not deliver babies and we understand this is causing long term discomfort. We have solved this (not the discomfort, the baby coming out part).
• We've also done general maintenance to improve sudden Vault shut down and removed some other pesky issues with the capacitors inside various aspects of the simulation.

Those who have yet to experience the free game can head over here and get started with building a state-of-the-art underground vault.