There are 2 repositories under game-backend topic.
Distributed server for social and realtime games and apps.
Game Microservice In Action blog sample code
A little experimental yet modular backend based on node js for trading card games
A library for the backend of the boardgame Carcassonne
It's like conquest, but with more quest and more con
This if the backend for InfiniTD: an incremental, multiplayer tower defense game. The live version can be found at https://infinitd.rofer.me/
Official registry for OpenGB modules.