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Sphenoid

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About Sphenoid

Sphenoid is a horror escape room game set in a prison full of secrets. You wake in your cell on the night The Warlock is executed in the electric chair. Before his death, he said he would take everyone with him except the person who had a strange object. You search for a way to survive the horrors unleashed after his execution and discover what happened to the other prisoners.

Explore the prison

You roam the prison, open cells, enter secret areas and find objects and clues. Puzzles help you uncover the prison’s mysteries, with each challenge built around logical solutions. Its flickering lights, shadows and eerie sounds create a dark, oppressive atmosphere, while hidden dangers await throughout the prison.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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