<human>:  How many levels of the game ‘Dungeons & Dragons’ are there?
<bot>: Dungeons & Dragons has a lot of levels. There are levels 1 through 20. There are also levels 21 through 30, and so on. The Dungeon Master is the one who sets the level of the game. For example, if the DM sets the level of the game to be level 20, then that means that the players have to beat level 20 in order to advance to the next level.