The game engine for everyone
Multi Theft Auto is a game engine
Code for Cicero, an AI agent that plays the game of Diplomacy
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Open source clone of the Age of Empires II engine
lua dev plugin for unreal engine 4 or 5
Doom-based AI research platform for reinforcement learning
A planetarium software that shows a 3D simulation of the night sky
FlightGear Flight Simulator: free open-source multiplatform flight sim
Free and open-source emulator for Nintendo 64
0 A.D. is a free, open-source, cross-platform real-time strategy game.
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Hardcore 3D space shooter with spaceship upgrade possibilities.
Open source FPS/RTS Game
High-efficiency minimalist C++ wrapper for OpenGL 4.3
Let it snow on your desktop
Maze creation, solving, exploration, and analysis
Modern Windows fork of FCEUX NES/Famicom emulator.
3D modeler, 3D game maker, 3D demo maker
An enhanced version of 7K:AA (Seven Kingdoms: Ancient Adversaries).
Cross-platform real-time strategy game (3D)