s&box is a modern game engine, built on Valve's Source 2
An open source re-implementation of RollerCoaster Tycoon 2
The HTML5 Creation Engine
Cross-platform 2D and 3D game engine with modular architecture
Open-source engine for Heroes of Might and Magic III
A complete 3-D game development suite written in Java
Accuracy-focused XNA4 reimplementation for open platforms
Programming eXperience Toolkit
An open source reimplementation of the Among Us Server
Open source library for N64 development
Emulator for the Game Boy, Game Boy Color, and Game Boy Advance
The ioquake3 community effort to continue supporting/developing id's
Fully async, multithreaded, predictive, open source, 3.01 reach
A tech mod for Minecraft themed around the magic of nature
Solar2D Game Engine main repository (ex Corona SDK)
Powerful, mature open-source cross-platform game engine for Python
X-Plane plugin that displays a tablet to aid VR usage
Jazz² Resurrection: Open-source reimplementation of Jazz Jackrabbit 2
Android real-time display control software
Simple DirectMedia Layer
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
C# application with primary purpose of farming Steam cards
MCDaemon, a python tool to control your Minecraft server
dhewm 3 main repository
A refreshingly simple data-driven game engine built in Rust