PrismGB
Play your ModRetro Chromatic on any screen
Relive your best moments, never lose a secret, and make it look perfect.
Features
Everything you need to enjoy play on the big screen
Live Streaming
Play on your computer with almost no delay
Stream straight from your Chromatic so everything still feels instant.
Screenshots
One-click captures at full quality
Save your favorite gaming moments instantly with a single click.
Recording
Capture full gameplay sessions
Record and export as MP4, WebM, or MOV—ready to share or edit.
Cross-Platform
Works on the computer you already have
Windows, macOS, and Linux (including Raspberry Pi) with tray controls and automatic updates.
Getting Started
Connect your Chromatic and start playing in seconds
Launch PrismGB
Download and open the app on your computer
Connect Your Chromatic
Plug in your device via USB
Click the Gem
Tap the Gem icon to start gaming on the big screen
Download
Free and open source for all platforms
v1.2.1 Latest
Frequently Asked Questions
Find answers to common questions about PrismGB
Getting Started
What devices are supported?
PrismGB is designed exclusively for the ModRetro Chromatic handheld gaming device. Other devices are not currently supported.
Do I need to install drivers?
Windows and macOS work out of the box. On Linux you may need one quick USB package - see the GitHub page for the short setup steps.
What are the system requirements?
Works on Windows 10+, macOS 10.15+, or modern Linux (including Raspberry Pi and other ARM64 devices) with a USB port for your Chromatic.
Features
What are the render presets?
Pick from five looks: True Color (original GBC feel), Vibrant (brighter), Hi-Def (sharper edges), Vintage (CRT-style scanlines), and Pixel (LCD grid overlay).
Where are my screenshots and recordings saved?
Captures save to your regular Videos or Pictures folder with clear timestamps so you can find them later.
Troubleshooting
Why does PrismGB need camera and microphone access on Mac?
The Chromatic streams video over USB, and macOS treats USB video devices as cameras. PrismGB will ask for camera and microphone access the first time you launch it—just click Allow. If you missed the prompt, you can grant permission in System Settings → Privacy & Security. Without this, the video stream won't appear.
My Chromatic isn't detected. What should I do?
Make sure your Chromatic is powered on, then try a different USB port or cable. If it still doesn't show up, restart PrismGB and plug it back in.
The video stream is laggy or choppy. How can I fix it?
Switch to a lighter visual style in settings. If it still feels off, restart the app or reconnect your Chromatic.
Recording fails or produces no output. What's wrong?
Check that you have enough disk space. Close other apps that might be using your camera or microphone, then try again.
Still have questions?
We're here to help. Reach out via email or open an issue on GitHub.
Community Project Disclaimer
PrismGB is an independent, community-driven project. It is not affiliated with, endorsed by, or sponsored by ModRetro, the Chromatic team, or any game publishers or rights holders.
Chromatic is a ModRetro product, and all game titles, trademarks, and other intellectual property remain the property of their respective owners. For official support, firmware updates, or product information, please visit ModRetro directly.