Powerful, mature open-source cross-platform game engine for Python
Accuracy-focused XNA4 reimplementation for open platforms
3D Procedural Game Engine Using OpenGL
A simple and easy-to-use library to enjoy videogames programming
One framework for creating powerful cross-platform games
Simple GTK# Paint Program
Doom-based AI research platform for reinforcement learning
Stride (formerly Xenko), a free and open-source cross-platform C# game
Pixel-art map visualizer for Minecraft
An open source re-implementation of RollerCoaster Tycoon 2
Cross-platform 2D and 3D game engine with modular architecture
Cross-platform 2D game engine focused on ultimate productivity
The game engine for everyone
Cross-platform, open source, and super fast MUD client with scripting
A game framework written with osu! in mind.
A charting and data visualization library for Unity
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
VR Mosaic - C++ Builder Applet v.2.5
Retro video game emulation for macOS
3D Engine c++
Online War system for IL-2 Sturmovik and Iron Front in ArmA 2
Roblox Shader – Download on Any GPU
GemRB is a portable open-source implementation of the Infinity Engine