Free Desktop App · Windows · Linux · Steam Deck
Corallium Nexus
Your handheld game library in one place. Play Game Boy Advance and DS games instantly, open 3DS games in Azahar, keep ten save slots per game — and download every Corallium app from the same window.
Download for your platform
Latest version · No account required · Controller-ready
3
Systems
11
Save Slots
Deck
Ready
Free
Forever
Systems
Plays in Nexus
Game Boy Advance
mGBA core — full speed and excellent compatibility.
Plays in Nexus
Nintendo DS
melonDS core — touch screen with mouse or Steam Deck trackpad.
Opens in Azahar
Nintendo 3DS
Nexus catalogs your 3DS games and launches them in Azahar, tracking play time.
Features
Play GBA & DS Instantly
Game Boy Advance (mGBA) and Nintendo DS (melonDS) run right inside Nexus. Pick a game, press Play — no emulator setup.
10 Save Slots + Auto Save
Save states in ten slots plus an Auto slot that writes when you leave a game. Battery saves are backed up too.
Automatic Box Art
Cover art is found for you, or set your own image. Search, filter by system, sort and favorite your library.
Built for Steam Deck
Big Picture layout, full controller navigation and on-screen button hints. Starts fullscreen in Game Mode.
Friends & Inbox
Sign in with your Corallium account to see who's online, send friend requests and get notifications. Optional.
Every Corallium App
Download and update TopazMD, AeroDeck and more from one place. Every file is checksum-verified.
Your Games Stay Yours
Nexus only reads the folders you choose. It never uploads, verifies or downloads games — and play stats stay on your device.
Quick Start
- 1Download the zip for your system — Windows has the installer inside, Linux / Steam Deck has the app folder
- 2Open Nexus → Settings → Library and choose your GBA, DS and 3DS folders
- 3Optional: point it at Azahar to launch 3DS games
- 4Pick a game and press Play — Esc or View + Menu opens the save menu
- 5Steam Deck: extract the zip, add corallium-nexus to Steam as a Non-Steam Game, then launch from Game Mode
- 6Sign in with your Corallium account for friends, inbox and app downloads
Built With
RuntimeElectron
UIReact
EmulationEmulatorJS · mGBA · melonDS
3DSAzahar (separate install)
SavesStored on your device
AccountOptional — Corallium sign-in
PlatformsWindows · Linux · Steam Deck
No subscription
No ads
Login optional
Saves stay local
Frequently Asked
Ready to play?
Free for Windows, Linux and Steam Deck. Bring your own games — Nexus handles the rest.
Corallium Nexus does not include or download games. Use it only with game backups you own the rights to. Setup guides are in the Corallium Nexus docs. Bug reports welcome via the support ticket system.