The Sixth Sin Demo
The Sixth Sin is a horror game set in a suspense-filled atmosphere where you battle demons, supernatural beings, and puzzles, surviving through your own ingenuity. The voice guiding you is one of them. Manage your inventory, complete rituals, and never let go of the light or your magical items.
- Release date
- October 12, 2026
- Platforms
- Windows
- Developer
- HAPPYTECH
- Publisher
- HAPPYTECH

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About The Sixth Sin Demo
WHAT'S IN THIS DEMOThis demo includes the opening section of the game’s first chapter. Approximately 25–35 minutes of gameplay.WHAT’S IN THE DEMOThe story’s opening: the box is brought to the orphanage and the doors are locked- The orphanage’s ground floor, the administration office, and the surrounding rooms- Grid-based inventory, crafting station, and storage chest system- Flashlight and ultraviolet mode; hiding from ghost children- Gramophone puzzle and the symbol lock on the wall- First ritual—mirror passage and encounter with the first demon— the demo ends hereFEATURES INCLUDED IN THE FULL VERSION BUT NOT IN THE DEMO- The remaining five seals and their associated rituals- The upper floors, basement, and other areas of the orphanage- Demon encounters and puzzle stages- The continuation and conclusion of the story- Additional items, recipes, weapon upgrades, and notes Demo save files are not transferred to the full version; you start the full version from the beginning.
Thirty-two children. One night. Not one of them cried out. In the winter of 1996, thirty-two children were found dead in their beds at St. Adela's Orphanage on Blackmoor Hill. No fire. No wounds. No sign of forced entry. Three separate investigations closed with the same sentence: cause undetermined. The only adult in the building that night was a carer named Mary Doyle. Mary vanished afterwards — and she took the institution's youngest resident with her, four-year-old Stephen.
Thirty years later, Mary died.…
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