Catechesis is a horror role-playing game where players step into the shoes of Daniel, an altar boy possessed by a demon. Set in a richly crafted world, players navigate a unique day and night cycle, balancing virtuous activities during daylight with intense demon battles at night. The game features a compelling narrative filled with lovable characters, complemented by anime-style cutscenes that enhance the storytelling experience.

Gameplay includes improved stealth mechanics, allowing players to utilize sound and light detection while exploring. Combat is slow-paced, focusing on a mix of ranged and melee attacks, supported by a twin-stick aiming system. With an engaging soundtrack by Michael (Garoad) Kelly, players can immerse themselves in the atmospheric score as they uncover valuable resources and hidden paths in this darkly enchanting world.