Knock Knock: Room Defense
Open in Google PlayApp details
- Version
- 1.10000.91
- Updated
- 11.09.2026
- Category
- Casual
- Compatibility
- Android 5.0+
- Package name
com.ygjszus.google- Source
- Official Google Play page
Knock Knock: Room Defense APK brings a unique twist to the tower defense genre by combining it with eerie horror elements and strategic gameplay. In this Android game, you must defend your home from ghosts and monsters that seek to break in. The premise is simple yet thrilling: when your city becomes a hunting ground for supernatural entities, someone is always knocking on your door.
Your task is to keep them out by closing the door and summoning heroes to build a formidable defense line. The game features five main locations that serve as battlegrounds: schools, hospitals, hotels, streets, and office buildings. These mundane settings transform into thrilling challenges where every detail matters.
You can choose your room, close the door, and relax while your heroes level up in dreams. This passive yet strategic approach allows you to build a robust defense without constant micromanagement, making it perfect for quick sessions or longer gaming marathons. Strategize to turn the tide in this mind game.
Unlike traditional tower defense games, Knock Knock: Room Defense requires you to upgrade everything from beds and doors to your heroes. Each element contributes to your overall defense line, so building the right lineup is crucial. Plan wisely for every challenge and event to ensure every win is rewarding.
How to install the app
- Check the version, Android compatibility, developer and source in the app details block.
- Open the official app page on Google Play if a link is available.
- Before installing, review app permissions and use only sources you trust.
Frequently asked questions
What is Knock Knock: Room Defense?
It is a horror-themed tower defense game where you defend your room from ghosts and monsters by summoning heroes and upgrading your environment.
Is the game free to play?
Yes, the game is free to download and play on Android devices, with optional in-game purchases and a Deluxe Preregistration Pack available.
What are the main features of the game?
Key features include strategic defense building, gothic chibi aesthetics, multiple haunted locations, and quick 5-minute matches.
How do I get the Deluxe Preregistration Pack?
You can receive the pack by preregistering for the game, which includes 404 draws, a character skin, a random orange hero, and limited decor.
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