In Simple DS Series Vol. 23 - The Puzzle Quest - Agaria no Kishi, players are asked to help a young girl, who is stuck in a locked room with a green block, in solving various puzzles and obstacles. Using the joystick control, Agaria needs to move the block around to get her out, before using the Nintendwn service to finish the game. There are many different types of puzzles to solve, as well as a total of 16 different characters to help the player along the way. One of the challenges in this game is to get all 16 characters to coexist together, as they will then all do their own thing and want Agaria to help her out. Players will need to use all of their clues and skills to get through the game, as there are no free players in this game. This is a singleplayer game, so players need to reach into their resources to help Aglia - whether that is their friends or family - in her journey to find a way to escape from the locked room.