World of Horror is a roguelite-style cosmic horror RPG set in the unsettling town of Shiokawa, Japan, where ancient deities are returning and madness looms. Players must navigate through a series of eerie environments, including hospitals and dark forests, all while facing bizarre phenomena that challenge their sanity. The game combines turn-based combat with strategic decision-making, requiring players to confront terrifying situations head-on.

The gameplay features five unique characters, each equipped to tackle over ten mysteries that are randomly generated, ensuring a different experience with each playthrough. Players can invoke dark rituals, uncover disturbing clues, and solve intricate puzzles, with many mysteries offering multiple endings. The haunting chiptune soundtrack complements the stark 1-bit art style, which is entirely created in MS Paint, enhancing the overall atmospheric experience of this adventure game.