Top Alternatives to Fallout Shelter for Windows
Fallout Shelter Free
A surprise casual hit from Bethesda
Fallout Shelter is a great little resource management game to play while waiting for the November 10th, 2015 release of Fallout 4. You have to manage the life of one of the underground Vaults where humanity is hiding out while waiting for the effects of a nuclear holocaust to subside.
Fallout Shelter is free to download and play, and also features optional micropayments.