Unholy Heights blends Tower Defense with Apartment Management Simulation, offering players a unique experience on the Nintendo Switch. In this game, you assume the role of the Devil, who has transformed a tenement building into a haven for various monsters. Your objective is to attract residents, manage their needs, and ensure they pay rent. The game features over 20 different monster species, each with unique traits and behaviors, making each playthrough dynamic and engaging. Players can furnish the apartments and create a comfortable living environment to keep the monsters happy.

As heroes threaten your monster tenants, you will need to strategize and prepare your residents for battle. Players can command their troops using an intuitive control scheme, and the game encourages players to build relationships with different monster families while managing quests to unlock new content. With procedurally generated monster traits and a humorous take on the genre, Unholy Heights provides a challenging and entertaining experience for puzzle game enthusiasts.