A dungeon is a place in the game where the players can play as a monster or as an intelligent humanoid. Check Five most interesting dungeon and dragon (DND) Gambler Game(s) You Must Try . Dungeons are usually designed for a certain level of challenge. There are several things to consider before making a dungeon. First, the dungeon must have a specific concept and be unique in its kind. It should also have monsters with their own motivation for living in the dungeon. Intelligent humanoids will have sleeping and storage rooms and shrines, while large beasts will have their lair and hunt near creatures that are vulnerable to their attacks.