It's Not My Vault!

From the introduction: For centuries, people have buried treasure in deep dungeons and surrounded it with guardians and traps. This treasure has just been left there. And what’s the use of that? The people who built these vaults are long dead, but you are very much alive, and you have needs. It would be much better to take it and put it to good use. You just have to convince the vault to give up the treasure.