Sekaiju to Fushigi no Dungeon (世界樹と不思議のダンジョン) is a dungeon crawler role-playing game developed by Spike Chunsoft and published by Nintendo for the Nintendo 3DS. The game is part of the Mystery Dungeon series, which is a spin-off of the popular Pokémon series. In this game, the player takes on the role of a young adventurer who is tasked with exploring a mysterious dungeon filled with monsters and treasures. The player must battle their way through the dungeon, collecting items and defeating enemies as they progress. As they progress, they will also encounter various NPCs who can offer advice and provide hints. The game features randomly generated dungeons, which offer a unique experience for each playthrough. Additionally, the game also features a crafting system, allowing the player to create powerful weapons and armor to aid them in their quest. Sekaiju to Fushigi no Dungeon is a fun and challenging dungeon crawler that offers an exciting adventure for all players.