Sekaiju no Meikyuu, known internationally as Etrian Odyssey, is a dungeon-crawling role-playing game series developed by Atlus. It features a unique mapping system where players draw their own maps on the Nintendo DS and 3DS touch screens as they explore labyrinthine dungeons filled with monsters and treasures. The game emphasizes strategic turn-based combat and character customization, offering a challenging and immersive experience for RPG enthusiasts.