You can make it - Open Source MMORPG Platform
The flexible game engine
Godot is a powerful cross-platform game engine
A Minecraft Launcher which is multi-functional, cross-platform
Solar2D Game Engine main repository (ex Corona SDK)
05k0nz's legacy is safe
Self-hosted game stream host for Moonlight
A complete 3-D game development suite written in Java
The main repository for the Linux and Mac OS Bedrock edition Minecraft
Voxel game-creation platform with easy modding and game creation
Write your game with TypeScript in UE or Unity
s&box is a modern game engine, built on Valve's Source 2
An Open Source Minecraft Launcher with Modern UX
A native Lua / LÖVE2D recreation of Gen 1 Poke
Mod manager for the video game RimWorld
Powerful, mature open-source cross-platform game engine for Python
An unofficial PC port of the Xbox 360 version of Sonic Unleashed
The Modrinth monorepo containing all code which powers Modrinth
Dedicated Game Server Hosting and Scaling for Multiplayer Games
Open Source MMORPG Framework
Cross-platform rhythm game for the keyboard
Cross-platform 2D game engine focused on ultimate productivity
Cross-platform 2D and 3D game engine with modular architecture
A bridge/proxy allowing you to connect to Minecraft
Mangos ZERO is a server for World of Warcraft