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Open-source Cloud Gaming Service For Retro Games
Video demo:
Technical wrapup:
CloudMorph: My current focus on generic solution for cloudgaming

Discord: Join Us


(Currently, I'm working on CloudMorph: It offers more generic solution to run any offline games/application on browser in Cloud Gaming approach:


CloudRetro provides an open-source cloud gaming platform for retro games. It started as an experiment for testing cloud gaming performance with WebRTC and Libretro, and now it aims to deliver the most modern and convenient gaming experience through the technology.

Theoretically, in cloud gaming, games are run on remote servers and media are streamed to the player optimally to ensure the most comfortable user interaction. It opens the ability to play any retro games on web-browser directly, which are fully compatible with multi-platform like Desktop, Android, IOS.

Try the service at

Direct play an existing game: Pokemon Emerald

In ideal network condition and less resource contention on servers, the game will run smoothly as in the video demo. Because I only hosted the platform on limited servers in US East, US West, Eu, Singapore, you may experience some latency issues + connection problem. You can try hosting the service following the instruction the next section to have a better sense of performance.

Screenshot Screenshot
screenshot screenshot
screenshot screenshot


  1. Cloud gaming: Game logic and storage is hosted on cloud service. It reduces the cumbersome of game initialization. Images and audio are streamed to user in the most optimal way using advanced encoding technology.
  2. Cross-platform compatibility: The game is run on web browser, the most universal built-in app. No console, plugin, external app or devices are needed.
  3. Emulator agnostic: The game can be played directly without any extra effort to set up the gaming emulator or platform.
  4. Collaborate gameplay: Follow the idea of crowdplay(TwitchPlaysPokemon), multiple players can play the same game together by addressing the same deeplink. The game experience is powered by cloud-gaming, so the game is much smoother. Check CrowdPlay section
  5. Online multiplayer: The first time in history, you can play multiplayer on Retro games online. You can try Samurai Showndown with 2 players for fighting game example.
  6. Horizontally scaled: The infrastructure is designed to be able to scale under high traffic by adding more instances.
  7. Cloud storage: Game state is storing on online storage, so you can come back and continue playing your incomplete game later.

Development environment

# Ubuntu / Windows (WSL2)
apt-get install -y make gcc pkg-config libvpx-dev libx264-dev libopus-dev libsdl2-dev

# MacOS
brew install pkg-config libvpx x264 opus sdl2

# Windows (MSYS2)
pacman -Sy --noconfirm --needed git make mingw-w64-x86_64-{gcc,pkgconf,dlfcn,libvpx,opus,x264-git,SDL2}

Because the coordinator and workers need to run simultaneously. Workers connect to the coordinator.

  1. Script
  • make
  • The scripts spawns 2 processes one in the background and one in foreground
  1. Manual
  • Need to run coordinator and worker separately in two session
  • go run cmd/coordinator/main.go - spawn coordinator
  • go run cmd/worker/main.go --coordinatorhost localhost:8000 - spawn workers connecting to coordinator

Additionally, you may install and configure an X Server display in order to be able to run OpenGL cores. See the docker-compose.yml file for Xvfb example config.

Run with Docker

Use makefile script: make or Docker Compose directly: docker-compose up --build (CLOUD_GAME_GAMES_PATH is env variable for games on your host). It will spawn a docker environment and you can access the service on localhost:8000.


The configuration parameters are stored in the configs/config.yaml file which is shared for all application instances on the same host system. It is possible to specify individual configuration files for each instance as well as override some parameters, for that purpose, please refer to the list of command-line options of the apps.


See an example of deployment scripts if you want to try to host your own cloud-retro copy in the cloud. This script ( allows pushing configured application to the group of servers automatically. The cloud server should be any Debian-based system with the docker-compose application installed.

Technical documents

High level Worker internal
screenshot screenshot


Crowd Play, play game together

By clicking these deep link, you can join the game directly and play it together with other people.

And you can host the new game by yourself by accessing and click "share" button to generate a permanent link to your game.

Synchronize a game session on multiple devices


We are very much thankful to everyone we've been lucky to collaborate with and many people for help and inspiration from their awesome works.






Cloud Game

Web-based Cloud Gaming service for Retro Game

Cloud Game Info

⭐ Stars1681
🔗 Source
🕒 Last Update10 months ago
🕒 Created4 years ago
🐞 Open Issues5
➗ Star-Issue Ratio336
😎 Authorgiongto35