Metroidvania games feature a large interconnected world map the player can explore, but access to parts of the world is limited by doors or other portals that can only be opened after the player has acquired special tools, weapons or abilities within the game. Acquiring such improvements also aids the player in defeating more difficult enemies and locating shortcuts and secret areas, and often includes retracing one's steps across the map.
Unlike adventure films, adventure games are not defined by story or content. Rather, adventure describes a manner of gameplay without reflex challenges or action. They normally require the player to solve various puzzles by interacting with people or the environment, most often in a non-confrontational way. It is considered a "purist" genre and tends to exclude anything which includes action elements beyond a mini game.