Pumpkin Seeds: The 51st Floor

A decade ago, civilization ended with the advent of superpowers, given to humanity so that the last one standing will create a new world.

Despite the world outside being a wasteland of violence and superpowers, there are people who have found ways to live peaceful, and even comfortable lives hidden away from those actively working to become god.

But there are a lot of tricky things people need to do the achieve that level of security, especially after 3/4th of the world population has been decimated and the rest are either hunting each other or being hunted.