s&box is a modern game engine, built on Valve's Source 2
Command & Conquer: Remastered Collection
Flax Engine, multi-platform 3D game engine
GZDoom is a feature centric port for all Doom engine games
Powerful, mature open-source cross-platform game engine for Python
The Playstation 2 emulator
A simple and easy-to-use library to enjoy videogames programming
Simple GTK# Paint Program
OptiScaler bridges upscaling/frame gen across GPUs
Cross-platform, open source, and super fast MUD client with scripting
Cross-platform 2D and 3D game engine with modular architecture
Doom-based AI research platform for reinforcement learning
An open source re-implementation of RollerCoaster Tycoon 2
The game engine for everyone
Stride (formerly Xenko), a free and open-source cross-platform C# game
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
UZDoom is a feature centric port for all Doom engine games
Cross-platform 2D game engine focused on ultimate productivity
A charting and data visualization library for Unity
A game framework written with osu! in mind.
3D Procedural Game Engine Using OpenGL
Pixel-art map visualizer for Minecraft
A tool for converting Xbox 360 shaders to HLSL
VR Mosaic - C++ Builder Applet v.2.5
3D Engine c++