Vault resource usage does not stop when you close the game until the last room is ready for harvest so do not leave a room needing 30 minutes running if you have to harvest food/power/water every 4 minutes.

There are lunchboxes, which contain five random item cards that can tremendously boost your Vault.

Other finite resources are stimpaks and RadAway, which are used to improve the health of your dwellers.

There are four basic resources in the game: Power, food, water, and caps.

Managing resources and dwellers is essential, as is keeping them happy. There is no end goal in the game, save building the biggest, best Vault you can.

The game is focused on balancing the needs of your Dwellers while providing them with the best quality of life, as well as defending it from threats. Your duties will include acquisition and distribution of resources, development of the Vault complex, multiplying the population, preventing crises (such as fires and raider attacks), and other similar activities. In the game, you are put in the role of the Overseer of a Vault of your choosing (the number is selected by you), and the goal is to successfully lead generations of Vault Dwellers to survive and thrive in post-nuclear America.

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