Game basics, world history, library
Download game with most preferable method
The main place of communication
The bronze badge? You get it from the first stage of the Metro City. The easiest way to farm it would be quitting the dungeon whenever you're about to enter the first boss, then re-enter it as necessary. Did you enter the Metro City solo, or you have another character in the party with you? If the other character's lv is lower, then the monsters' lv could end up outside your main character's range.