Good vault stories usually involve complex social structures within the vault. Take Vault 101 from Fallout 3. There was a strict isolationist policy, and the main character had to deal with the rules and the people who enforced them. The relationships between the different factions within the vault, like the Overseer and the rebels, add depth to the story.
In Fallout: New Vegas, Vault 22 has an interesting story. It was a vault where they were conducting agricultural experiments. However, things went wrong as mutated plants started to take over. The exploration of this vault reveals a lot about the hubris of the pre - war scientists who thought they could control nature completely. The remains of the vault and the mutated plant life make for a spooky and thought - provoking vault story.
The treasure vault in PSP Dynasty Warriors 2 was located in the central area of the game world near the castle. The treasure vault contains a large number of precious weapons, equipment, and props. Players can obtain these treasures by challenging various levels and modes.