Some apps are distributed as Split APKs (multiple .apk files packaged together) to optimize resources. Standard Android installers cannot open them.
v1.0.0 released
A hotel room that never stays the same.You wake up alone inside Room 303, with no memory of how you got there. The door is locked. The lights feel wrong. And every time you turn your head… something inside the room moves.
Room 303 is a short first-person psychological horror game designed for mobile. No monsters chasing you. No jumpscare spam. The horror comes from sound, atmosphere, and the room itself.
🔍 Features
- A fully interactive 3D hotel room
- Atmospheric lighting & sound design
- Clues to discover
- Objects move when you’re not looking
- Environmental storytelling
- Mobile-optimized controls
- Short, intense experience (10–15 minutes)
👻 What Makes It Scary?
- The room shifts when you turn away
- Furniture moves on its own
- Lights flicker randomly
- Voices and footsteps appear behind you
- The truth is revealed only at the end
🎮 Perfect for fans of:
- Psychological horror
- Backrooms style atmosphere
- Silent storytelling
- Short horror experiences
📱 Optimized for Mobile
- Smooth performance
- Simple touch controls
- Lightweight file size
⚠️ Disclaimer
This game contains flashing lights and intense sound effects.
Hello my dear and sweet game maker this is the third game of yours i have bought but I would like to give you a humble request next time please make game atleast half an hour long and make games like granny or ps1 style puzzle solving horror game waiting for the game bye🤗
Incredible story telling. This game really got me hanging onto the edge of my seat. I'm quite literally shaking in my boots!
fun game plays well on my pixel 6a
Stupid. All you do is click on a book about few times, then game over?
com.mechazerogame.room303 on the APK Downloader.Yes! Every APK download provided by APKDER undergoes rigorous security verification. We verify that the cryptographic signature of the APK file matches the official signature from the developer, ensuring the APK is original, untouched, and free from any modifications.
To install it, you first need to enable "Unknown Sources" in your Android device's security settings. After downloading the APK file from APKDER, tap it to begin the installation and follow the on-screen prompts.
Yes! As soon as the developer releases a new version of Room 303 : Mystery Horror Game, we will update and provide the updated APK on APKDER. You can simply download and install the new APK over the existing installation without losing your app data.
Yes. APKDER allows you to bypass geographic restrictions and download official APK files directly, even if the app or game is not officially available in your country's store.
A standard APK is a single installation package. An XAPK or Split APK contains multiple resource files (like OBB expansions or device-specific layout parts) packaged together. To install them, you can download splits individually or use dynamic helper tools like Split APKs Installer (SAI).
This APK download is 100% safe. We verify that the cryptographic signature of the file matches the official developer credentials. No modifications or adware are injected.