# Cosmic Horror - Horror Template | Summer Engine ## About this template Picture a game where players investigate strange occurrences and piece together that something vast and alien is present. Not a monster to fight. A presence whose existence alone breaks the protagonists mind. The horror is not violence. It is the realization that humanity is irrelevant. Summer Engine helps you build that growing comprehension through conversation. Describe the cult, the artifact, the entity. The AI helps construct investigation systems, sanity mechanics, and revelation pacing so the player arrives at horror through understanding, not jump scares. Cosmic horror games work when the player dreads learning more but cannot stop. Every document found, every ritual witnessed, every glimpse of something that should not exist makes the picture clearer and more terrifying. That investigative compulsion is the mechanic you are here to design. ## Who it's for * Writers and designers influenced by Lovecraft, Thomas Ligotti, or Jeff VanderMeer who want to build investigative dread. * Developers building mystery games who want the resolution to be worse than the question. * Teams interested in using knowledge itself as a horror mechanic rather than physical threat. * Fans of Call of Cthulhu, Cultist Simulator, or Sunless Sea who want to build in that tonal space. ## Highlights * ### Investigation Horror Build a mystery game where gathering information about the entity is the core loop, and each discovery increases dread rather than providing comfort. * ### Cult Narrative Game Design a story about a community in the grip of something beyond their understanding, told through documents, encounters, and environmental decay. ## Highlights ### Investigation loop Players gather clues, read documents, and speak with NPCs. Each piece of information makes the picture worse. Knowledge is not safety. ### Sanity and comprehension Understanding the entity costs the protagonist their grip on reality. Seeing too much changes perception. The world looks different after. ### Incomprehensible threats Enemies or presences that do not follow normal horror logic. Cannot be killed. Cannot be negotiated with. Can only be endured or fled. ### Forbidden knowledge tree A system tracking what the player has learned. More knowledge unlocks more of the truth while accelerating sanity cost. ## Features * ### Investigation and clue system Players collect documents, examine objects, and interview characters. A journal or evidence board tracks connections and builds the full picture. * ### Sanity degradation Extended exposure to eldritch events, forbidden texts, or direct entity contact costs sanity. Low sanity changes what the player sees and hears. * ### Entity encounter design Threats that cannot be fought, only survived. Scripted and semi-scripted sequences where the player must act to avoid catastrophic sanity loss. * ### Mythos knowledge tracking A system that records cosmic revelations and adjusts dialogue, NPC reactions, and available story branches based on what the player knows. ## Genre fit * Horror * Cosmic * Mystery * Narrative * Investigation * Desktop * Console ## Related Templates [View All](https://www.summerengine.com/templates) [Psychological Horror Build a horror game where reality bends, the narrative fractures, and the environment cannot be trusted. Summer Engine helps you create systems that make players question what is real. Horror](https://www.summerengine.com/templates/horror/psychological-horror/psychological-horror) [Walking Sim Horror Build a narrative horror walking sim where exploration and discovery carry the dread. No combat, no survival mechanics. Just a player, a space, and something deeply wrong. Summer Engine builds the atmosphere with you. Horror](https://www.summerengine.com/templates/horror/walking-sim-horror/walking-sim-horror) [Folk Horror Build a horror game rooted in community, isolation, and the horror of deeply held belief. Rural settings, ancient ritual, and the outsider protagonist who discovers what the locals have always known. Summer Engine builds the world with you. Horror](https://www.summerengine.com/templates/horror/folk-horror/folk-horror) Source: https://www.summerengine.com/templates/horror/cosmic-horror/cosmic-horror --- ## Machine-readable resources - Site index for agents: https://www.summerengine.com/llms.txt - Full inlined content: https://www.summerengine.com/llms-full.txt - Porting catalog: https://www.summerengine.com/llms-porting.txt - Structured catalog: https://www.summerengine.com/agent-catalog.json - Sitemap: https://www.summerengine.com/sitemap.xml - Developer resources: https://www.summerengine.com/docs