Labyrinth of Refrain: Coven of Dusk is a dungeon-crawler RPG developed by Nippon Ichi Software for the Nintendo Switch and originally released in 2018. In the game, players assume the role of the book Tractatus de Monstrum, guiding a brigade of puppet soldiers through a labyrinthine underground city. The game combines traditional turn-based battles with a unique brigade system, offering strategic depth and an engaging narrative.