KeyMaster: Prologue Horror

Contains ads
5K+
Downloads
Content rating
Everyone 10+
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About this game

You wake up in complete darkness. Alone.
No hints. Only your logic, the keys you find, and the impenetrable dark.

An abandoned 1980s hospital holds its grim secret. This is a speedrun horror: you need to think and act fast before the old nurse starts patrolling the halls.

You might beat it in 15 minutes. Or it might take you a full hour to find the way out. Not everything is as simple as it seems! You will face challenging puzzles, and your only protection is a manual save system. Use it wisely!

IMPORTANT: Be sure to read the in-game guide from the main menu! It's almost impossible to figure everything out without it.

Can you uncover its secrets and escape? How long will you last before you give up?
Updated on
Feb 11, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location and Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted